Slider 1 Example

<div role="application">
  <script type="text/javascript">
    var slider1 = new Slider("sr1");
    widgets.add(slider1);
    var slider2 = new Slider("sr2");
    widgets.add(slider2);
  </script>

  <h3>Slider Example 1</h3>
  
  <div
    class="slider"
    id="sr1">
    
        <img id="sr1_knob"
      src="images/slider2a.gif"
          role="slider"
      tabindex="0"
      aria-labelledby="sr1_label"
      aria-valuemin="0"
      aria-valuenow="70"
      aria-valuemax="100"
        />
    
    <div id="sr1_knob_text" role="presentation">70</div>
    
    <div id="sr1_label" class="hidden">Example 1</div>
  
  </div>  
          
      
  <h3>Slider Example 2</h3>
  
  <div
    class="slider"
    id="sr2">
    
    <img id="sr2_knob"
      src="images/slider2a.gif"
      role="slider"
      tabindex="0"
      aria-labelledby="sr2_label"
      aria-valuemin="100"
      aria-valuenow="500"
      aria-valuemax="1000"
    />
    
    <div id="sr2_knob_text" role="presentation">500</div>

    <div id="sr2_label"  class="hidden">Example 2</div>
    
  
  </div>
  
</div>

  <script type="text/javascript">
/**
*
* The Globale Variables
*/

if (!window.Node) {
  var Node = {            // If there is no Node object, define one
    ELEMENT_NODE: 1,    // with the following properties and values.
    ATTRIBUTE_NODE: 2,  // Note that these are HTML node types only.
    TEXT_NODE: 3,       // For XML-specific nodes, you need to add
    COMMENT_NODE: 8,    // other constants here.
    DOCUMENT_NODE: 9,
    DOCUMENT_FRAGMENT_NODE: 11
  }
}


var KEY_PAGEUP   = 33;
var KEY_PAGEDOWN = 34;
var KEY_END      = 35;
var KEY_HOME     = 36;

var KEY_LEFT     = 37;
var KEY_UP       = 38;
var KEY_RIGHT    = 39;
var KEY_DOWN     = 40;

var KEY_SPACE    = 32;
var KEY_TAB      = 9;

var KEY_BACKSPACE = 8;
var KEY_DELETE    = 46;
var KEY_ENTER     = 13;
var KEY_INSERT    = 45;
var KEY_ESCAPE    = 27;

var KEY_F1        = 112;
var KEY_F2        = 113;
var KEY_F3        = 114;
var KEY_F4        = 115;
var KEY_F5        = 116;
var KEY_F6        = 117;
var KEY_F7        = 118;
var KEY_F8        = 119;
var KEY_F9        = 120;
var KEY_F10       = 121;

var KEY_M         = 77;

var NS_XHTML = "http://www.w3.org/1999/xhtml"
var NS_STATE = "http://www.w3.org/2005/07/aaa";

// **********************************************
// *
// * Commonly used helper functions
// *
// **********************************************

/**
*
* nextSiblingElement
*
* @contructor
*/

function nextSiblingElement( node ) {

  var next_node = node.nextSibling;

  while( next_node
    && (next_node.nodeType != Node.ELEMENT_NODE) ) {
    next_node = next_node.nextSibling;
  }  // endwhile

  return next_node;
  
}

/**
*
* previousSiblingElement
*
* @param ( node ) node object for which you are looking for the next sibling element node
*
* @return ( node) next sibling or "null"
*/

function previousSiblingElement( node ) {

  var next_node = node.previousSibling;

  while( next_node
    && (next_node.nodeType != Node.ELEMENT_NODE) ) {
    next_node = next_node.previousSibling;
  }  // endwhile

  return next_node;
  
}

/**
*
* firstChildElement
*
* @param ( node ) node object for which you are looking for the first child element node
*
* @return ( node) next sibling or "null"
*/

function firstChildElement( node ) {

  var next_node = node.firstChild;

  while( next_node
    && (next_node.nodeType != Node.ELEMENT_NODE) ) {
    next_node = next_node.nextSibling;
  }  // endwhile


  return next_node;
  
}

/**
*
* getTextContentOfNode
*
* @contructor
*/

function getTextContentOfNode( node ) {

  var next_node = node.firstChild;
  var str = "";

  while( next_node ) {
    
    if( (next_node.nodeType == Node.TEXT_NODE ) &&
      (next_node.length > 0 )
     )
      str += next_node.data;
    
    
    next_node = next_node.nextSibling;
    
  }  // endwhile

  return str;
  
}

/**
*
* setTextContentOfNode
*
* @contructor
*/

function setTextContentOfNode( node, text ) {

   // Generate a new text node with the text value
    var text_node = document.createTextNode(text);
  
    // Remove child nodes to remove text
    while (node.firstChild) {
      node.removeChild(node.firstChild);
    } // while

    // Append new text to the container element
    node.appendChild( text_node );

}
  </script>

  <script type="text/javascript">
// JavaScript Document
// This module is to abstract browser dependencies
// This makes the widget code cleaner and earier to read by making most browser specfic coding
// in one place rather han scatered throghot documents
var ARIA_STATE = "aria-";

//
// WebBrowser object to abstract accessibility API differences between web standards supporting browsers and Internet Explorer 7.0
//
// The state variable keeps track of current state of checkbox
function WebBrowser() {

}


//
// keyCode is a function to get the keycode from a keypress event
//
// @param ( event object) event is an event object
//
// @return ( keycode )

WebBrowser.prototype.keyCode = function( event ) {
  var e = event || window.event;
  
  return e.keyCode;
}  

/**
* OnClick Event Simulator
*
* @param ( node ) DOM node object
* @return nothing
*/

if( document.createEvent ) {

  // If a web standards based browser implement this function

  WebBrowser.prototype.simulateOnClickEvent = function( node ) {
    // W3C DOM Events way to trigger a "click" event
    var e = document.createEvent('MouseEvents');
    e.initEvent( 'click', true, true );

    node.dispatchEvent( e );

  }

} else {

  // If a Microsoft IE based browser implement this function
  
  WebBrowser.prototype.simulateOnClickEvent = function( node ) {

    var e = document.createEventObject();
    node.fireEvent( "onclick", e );

  } // endif

}

if ( document.addEventListener ) {

  // If a web standards based browser implement this function

  WebBrowser.prototype.setMouseCapture = function( node, clickHandler, downHandler, moveHandler, upHandler ) {

    if( clickHandler )
      document.addEventListener( "click",     clickHandler, true );
    
    if( downHandler )
      document.addEventListener( "mousedown", downHandler,  true );

    if( moveHandler )
      document.addEventListener( "mousemove", moveHandler,  true );
    
    if( upHandler)
      document.addEventListener( "mouseup",   upHandler,    true );

  }

  WebBrowser.prototype.releaseMouseCapture = function( node, clickHandler, downHandler, moveHandler, upHandler ) {

  if( upHandler)
      document.removeEventListener( "mouseup",   upHandler,    true );
      
    if( moveHandler )
      document.removeEventListener( "mousemove", moveHandler,  true );
    
    if( downHandler )
      document.removeEventListener( "mousedown", downHandler,  true );
      
    if( clickHandler )
      document.removeEventListener( "click",     clickHandler, true );

  }

} else {

  // If a Microsoft IE based browser implement this function

  WebBrowser.prototype.setMouseCapture = function( node, clickHandler, downHandler, moveHandler, upHandler ) {

   node.setCapture();
   if( clickHandler)
     node.attachEvent( "onclick", clickHandler );
    
   if( downHandler)
     node.attachEvent( "onmousedown", downHandler );
    
   if( moveHandler )
     node.attachEvent( "onmousemove", moveHandler );
    
   if( upHandler )
     node.attachEvent( "onmouseup", upHandler );

  } // endif

  WebBrowser.prototype.releaseMouseCapture = function( node, clickHandler, downHandler, moveHandler, upHandler ) {

   if( upHandler )
     node.detachEvent( "onmouseup", upHandler );
    
   if( moveHandler )
     node.detachEvent( "onmousemove", moveHandler );
    
   if( downHandler)
     node.detachEvent( "onmousedown", downHandler );
    
   if( clickHandler)
     node.detachEvent( "onclick", clickHandler );
    
     node.releaseCapture();

  } // endif


}




if (typeof document.documentElement.setAttributeNS != 'undefined') {

  WebBrowser.prototype.stopPropagation = function( event ) {
    if( event.stopPropagation )
      event.stopPropagation();
    if( event.preventDefault )
      event.preventDefault();
    return false;
  }

  WebBrowser.prototype.target = function( event ) {
  return event.target;
  }
  
  WebBrowser.prototype.attrName = function( event ) {
  return event.attrName;
  }

  WebBrowser.prototype.testAttrName = function( event , attrName) {
  return event.attrName == attrName;
  }

  WebBrowser.prototype.charCode = function(event) {
     return event.charCode;
  }

  WebBrowser.prototype.calculateOffsetLeft = function( node ) {
  return node.offsetLeft;    
  }
  
  WebBrowser.prototype.calculateOffsetTop = function( node ) {
  return node.offsetTop;    
  }
  
  WebBrowser.prototype.pageX = function( e ) {
    return e.pageX;    
  }
  
  WebBrowser.prototype.pageY = function( e ) {
    return e.pageY;    
  }
  
  WebBrowser.prototype.setNodePosition = function(node,left,top) {
    node.style.left = left+"px";
    node.style.top = top+"px";
  }


} else {

  WebBrowser.prototype.stopPropagation = function( event ) {
    event.cancelBubble = true;
    event.returnValue = false;
    return false;
  }

  WebBrowser.prototype.charCode = function(event) {
    return window.browser.keyCode( event );
  }

  WebBrowser.prototype.target = function( event ) {
    return event.srcElement;
  }

  WebBrowser.prototype.attrName = function( event ) {
  return event.propertyName;
  }
    
  WebBrowser.prototype.testAttrName = function( event , attrName) {
        
        var str = attrName;
        
        if( attrName.indexOf("aria-") >=0 ) {
            str = attrName.replace(/aria-/,"");
            var node = document.getElementById('test1');
            if( node )
               node.innerHTML = str.substr(0,1).toUpperCase();
            var len  = str.length;
            str = "aria" + str.substr(0,1).toUpperCase() + str.substr(1, len);
            var node = document.getElementById('test2');
//            if( node )
//               node.innerHTML = node.innerHTML + "<li>" + str + "</li>";
        }
        
        return event.propertyName == str;
  }
    
  WebBrowser.prototype.calculateOffsetLeft = function(node) {
  var offset = 0;
  
  while( node ) {
    offset += node.offsetLeft;
    node = node.offsetParent;
  }
  
  return offset;    
  }
  
  WebBrowser.prototype.calculateOffsetTop = function(node) {
  var offset = 0;
  
  while( node ) {
    offset = offset + node.offsetTop;
    node = node.offsetParent;
  }
  
  return offset;    
  }
  
  WebBrowser.prototype.pageX = function( e ) {
    return e.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft);    
  }
  
  WebBrowser.prototype.pageY = function( e ) {
    return e.clientY + (document.documentElement.scrollTop || document.body.scrollTop);    
  }
  
  WebBrowser.prototype.setNodePosition = function(node,left,top) {
    offsetx = 0;
    offsety = 0;
    nnode = node.offsetParent
    while( nnode ) {
      offsetx = offsetx + nnode.offsetLeft;
      offsety = offsety + nnode.offsetTop;
      nnode = nnode.offsetParent;
    }
    node.style.left = left-offsetx+"px";
    node.style.top = top-offsety+"px";
  }
  
};


if (document.addEventListener) {

     // Functions for W3C Standards compliant implementation of adding event handlers

     WebBrowser.prototype.addEvent = function(elmTarget, sEventName, fCallback) {
       elmTarget.addEventListener(sEventName, fCallback, false);
       returnValue = true;
     };

     WebBrowser.prototype.removeEvent = function(elmTarget, sEventName, fCallback) {
       elmTarget.removeEventListener(sEventName, fCallback, false);
       returnValue = true;
     };

     WebBrowser.prototype.addChangeEvent =  function(elmTarget, fCallback) {
      elmTarget.addEventListener("DOMAttrModified", fCallback, false);
      returnValue = true;
    };

} else {

  if(document.attachEvent) {

     // IE Specific Event handler functions
     WebBrowser.prototype.addEvent = function(elmTarget, sEventName, fCallback) {
       returnValue = elmTarget.attachEvent('on' + sEventName, fCallback);
     };

     WebBrowser.prototype.removeEvent = function(elmTarget, sEventName, fCallback) {
       returnValue = elmTarget.detachEvent('on' + sEventName, fCallback);
     };

    WebBrowser.prototype.addChangeEvent =  function(elmTarget, fCallback) {
      returnValue = elmTarget.attachEvent("onpropertychange", fCallback);
    };

  } else {

     // For browsers that do not support W3C or IE event functions
     WebBrowser.prototype.addEvent = function(elmTarget, sEventName, fCallback) {
       return false;
     };

     WebBrowser.prototype.removeEvent = function(elmTarget, sEventName, fCallback) {
       return false;
     };

     WebBrowser.prototype.addChangeEvent =  function(elmTarget, fCallback) {
       return false;
     };

  }

}

var browser = new WebBrowser();

  </script>

  <script type="text/javascript">
// JavaScript Document
// Widgets is a way to initialize widgets in the ARIA examples


function Widgets() {
  this.widgets = new Array();
}

/**
* add is member of the Widgets Object
* and used add a widget ot the list of widgets to be intitialized
* as part of the onload event
* The controls array is the list of controls to initialize
* @member Enable
* @return none
*/

Widgets.prototype.add = function(obj) {
  this.widgets[this.widgets.length] = obj;
}

/**
* init is member of the Widgets Object
* and is called by the onload event to initialize widgets in the web resource
* The controls array is the list of controls to initialize
* @member Enable
* @return none
*/

Widgets.prototype.init = function() {
     
   for(var i = 0; i < this.widgets.length; i++ )
     this.widgets[i].init();
}

var widgets = new Widgets();

function initApp() {
  widgets.init();
}

  </script>

  <script type="text/javascript">

/*
* sliderMoveKnob
*
* @param ( slider object ) slider object
*
* @return none
*/

function sliderMoveKnob( slider ) {

     // Calculate the position to move the slider knob

     var value_min    = slider.node_knob.getAttribute("aria-valuemin");
     var value_max    = slider.node_knob.getAttribute("aria-valuemax");
     var value_now    = slider.node_knob.getAttribute("aria-valuenow");
     var value_range  = value_max - value_min;

     var top  = browser.calculateOffsetTop( slider.node );
     var left = browser.calculateOffsetLeft( slider.node );
     var width = slider.node.clientWidth;
     var button_offset = Math.round((slider.node_knob.offsetWidth) / 2 );
    
     top -= 25;
     left = left - button_offset + ((value_now - value_min ) * width) / value_range;
  
     slider.node_knob.style.position = "absolute";
     slider.node_knob.style.top  = top + "px";
     slider.node_knob.style.left = left + "px";
  
     setTextContentOfNode(slider.node_knob_text, value_now);

     slider.node_knob_text.style.position = "absolute";

     var text_offset = Math.round((slider.node_knob.offsetWidth - slider.node_knob_text.offsetWidth) / 2 );

     slider.node_knob_text.style.top  = top + 80 + "px";
     slider.node_knob_text.style.left = left + text_offset + "px";
          

} // end sliderMoveKnob

/*
* sliderSetValueNow
*
* @param ( slider object ) slider object
* @param ( value) new value for slider
*
* @return none
*/

function sliderSetValueNow( slider, value ) {

  var value_min    = slider.node_knob.getAttribute("aria-valuemin");
  var value_max    = slider.node_knob.getAttribute("aria-valuemax");
  var value_range  = value_max - value_min;

  // Check to se if the new value is in the range of slider values

  if(value > value_max)
      value = value_max;
      
  if(value < value_min)
      value = value_min;
      
  // Update the slider value    
      
  slider.node_knob.setAttribute("aria-valuenow", value );  

}

/*
* SliderRange Object
*
* @param ( id ) id of text to style
*
* @return none
*/

function Slider( id ) {

  this.id = id;
  this.id_knob  = id + "_knob";
  this.id_knob_text = id + "_knob_text";
  
  this.mouse_down = false;

}

/*
* Init
*
* @member SliderRange
* @param ( id ) id of text to style
*
* @return none
*/

Slider.prototype.init = function() {

  this.node        = document.getElementById(this.id);
  this.node_knob  = document.getElementById(this.id_knob);
  this.node_knob_text  = document.getElementById(this.id_knob_text);

  // Initialize position of knob
  sliderMoveKnob( this );

  var obj1 = this.node_knob;

  // add focus and blur event handlers
  browser.addEvent(this.node_knob,  "focus", function(event) {handleSliderFocusEvent(event, obj1 );}, false);
  browser.addEvent(this.node_knob,  "blur",  function(event) {handleSliderBlurEvent(event, obj1 );}, false);

  var obj = this;

  // add keyboard event handler
  browser.addEvent(this.node_knob,  "keydown", function(event) {handleSliderKeyDownEvent(event, obj );}, false);

  // add mouse event handler
  browser.addEvent(this.node_knob,  "mousedown", function(event) {handleSliderMouseDownEvent(event, obj );}, false);

  // Add event handlers for checking if something changed the aria-valuenow attribute
  browser.addChangeEvent(this.node_knob, function(event) {handleSliderModifyEvent(event, obj); }, false);


}

// handleSliderKeyDownEvent
//
function handleSliderKeyDownEvent(event, slider ) {
  var e = event || window.event;
  

    if( e.ctrlKey || e.shiftKey || e.altKey )
      return true;

    switch( e.keyCode ) {
    
      case KEY_END:
           var value = new Number(slider.node_knob.getAttribute("aria-valuemax"));
           sliderSetValueNow( slider, value );
       return browser.stopPropagation( e );
           break;

      case KEY_HOME:
           var value = new Number(slider.node_knob.getAttribute("aria-valuemin"));
           sliderSetValueNow( slider, value );
           return browser.stopPropagation( e );
           break;

      case KEY_PAGEUP:
           var value = new Number(slider.node_knob.getAttribute("aria-valuenow")) + 10;
           sliderSetValueNow( slider, value );
           return browser.stopPropagation( e );
           break;
      
    case KEY_PAGEDOWN:
           var value = new Number(slider.node_knob.getAttribute("aria-valuenow")) - 10;
           sliderSetValueNow( slider, value );
           return browser.stopPropagation( e );
           break;

    case KEY_UP:
    case KEY_RIGHT:
           var value = new Number(slider.node_knob.getAttribute("aria-valuenow")) + 1;
           sliderSetValueNow( slider, value );
           return browser.stopPropagation( e );
       break;
      
    case KEY_DOWN:
      case KEY_LEFT:
           var value = new Number(slider.node_knob.getAttribute("aria-valuenow")) - 1;
           sliderSetValueNow( slider, value );
           return browser.stopPropagation( e );
           break;

  } // end switch
      
      
  return true;
  
}



// handleSliderMouseDownEvent
//
function handleSliderMouseDownEvent(event, slider ) {
  var e = event || window.event;

  slider.node_knob.src = "images/slider2.gif";
  slider.node_knob.focus();

  slider.mouse_down = true;
  slider.move_function = function( event ) { handleSliderMouseMoveEvent(event, slider ); };
  slider.up_function = function( event ) { handleSliderMouseUpEvent(event, slider ); };

  browser.setMouseCapture( slider.node_knob, null, null, slider.move_function, slider.up_function );

  return browser.stopPropagation( e );

}

// handleSliderMouseMoveEvent
//
function handleSliderMouseMoveEvent(event, slider ) {
  var e = event || window.event;

  if (e.type == "mousemove" && slider.mouse_down)  {
    
  var pointer_page_x = Math.round( browser.pageX( e) );
  var slider_page_x = Math.round(browser.calculateOffsetLeft( slider.node ));
  var button_width_offset = Math.round((slider.node_knob.offsetWidth) / 4 );
  
  var diff = pointer_page_x - slider_page_x + button_width_offset;
  
  if( diff > 0 ) {
    
    value_min   = Math.round(slider.node_knob.getAttribute("aria-valuemin"));  
    value_max   = Math.round(slider.node_knob.getAttribute("aria-valuemax"));  
    slider_max  = Math.round(slider.node_knob.getAttribute("aria-valuemax"));  
    value_size = slider_max - value_min;
    
      // calculate the percentage of the slider bar where the user clicked
      value_now = value_min + Math.round(( diff * value_size ) / slider.node.offsetWidth);
  
    if( value_now > value_max )
      value_now = value_max;
    
  } else {
    
    value_now =  slider.node_knob.getAttribute("aria-valuemin");   
    
  }
  
    sliderSetValueNow( slider, value_now );
  
  return browser.stopPropagation( e );
    
  }  //endif
  
  return browser.stopPropagation( e );

}

// handleSliderMouseUpEvent
//
function handleSliderMouseUpEvent(event, slider ) {
  var e = event || window.event;

  slider.node_knob.src = "images/slider2a.gif";

  slider.mouse_down = false;
  browser.releaseMouseCapture( slider.node_knob, null, null, slider.move_function, slider.up_function );

  return browser.stopPropagation( e );

}

/**
* handleCheckboxModifyEvent processes keys associated with a checkbox
*
* @param ( event ) event is the event handler for the event
* @param ( Slider object ) slider is the Slider object that is the target of the keyboard event
*
* @return false to stop event propagation if mouse event was used by checkbox, else true
*/

function handleSliderModifyEvent(event, slider){

    // If IE get the IE event object
   var e = event || window.event;


   // Check to see if aria-value now changed and move the slider to the new position
   if( browser.attrName(e) == "aria-valuenow" ) {
  
     sliderMoveKnob( slider );
  
   }  // endif

    return browser.stopPropagation(e);

} // end handleSliderKeyDownEvent


// handleSliderFocusEvent
//
function handleSliderFocusEvent(event, node ) {
  var e = event || window.event;

  node.src = "images/slider2.gif";
  
  return browser.stopPropagation( e );

}


// handleSliderBlurEvent
//
function handleSliderBlurEvent(event, node ) {
  var e = event || window.event;

  node.src = "images/slider2a.gif";
  
  return browser.stopPropagation( e );

}


  </script>

  <style type="text/css">
/* CSS Document */

.label {
  margin: 0;
  padding: 0;
  margin-top: 2em;
  margin-bottom: .5em;  
  clear: both;
  font-weight: bold;
}


div.slider {
  margin: 0;
  padding: 0;
  margin-top: 100px;
  margin-bottom: 100px;
  width: 540px;
  height: 20px;
  border: 2px solid black;
  background-color: #A0A0A0;
}

div.slider img  {
  margin: 0;
  padding: 0;
  position: absolute;
  left: -30em;
  top: -30em;
}

.hidden {
  position: absolute;
  top: -20em;
  left: -200em;
}
  </style>