function Browser() {

  var ua, s, i;

  this.isIE    = false;
  this.isNS    = false;
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var browser = new Browser();

// Global object to hold drag information.

var dragObj = new Object();
dragObj.zIndex = 10;

function dragStart(event, id) {

  var el;
  var x, y;

  // If an element id was given, find it. Otherwise use the element being
  // clicked on.

  if (id)
    dragObj.elNode = document.getElementById(id);
  else {
    if (browser.isIE)
      dragObj.elNode = window.event.srcElement;
    if (browser.isNS)
      dragObj.elNode = event.target;

    // If this is a text node, use its parent element.

    if (dragObj.elNode.nodeType == 3)
      dragObj.elNode = dragObj.elNode.parentNode;
  }

  // Get cursor position with respect to the page.

  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  // Save starting positions of cursor and element.

  dragObj.cursorStartX = x;
  dragObj.cursorStartY = y;
  dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
  dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);


  if ((i = id.indexOf("FloatingHelp")) >= 0)
  {
	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 4;
    if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 32;
  }
  else if ((i = id.indexOf("ValidationPage")) >= 0)
  {
	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = -299;
    if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 32;
  }
  else if ((i = id.indexOf("FinaliseApplication")) >= 0)
  {
	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 4;
    if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 32;
  }
  else if ((i = id.indexOf("ValidationSummary")) >= 0)
  {
	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 4;
    if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 32;
  }
  else
  {
	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
    if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;
  } 
  

  // Update element's z-index.

  dragObj.elNode.style.zIndex = ++dragObj.zIndex;

  // Capture mousemove and mouseup events on the page.

  if (browser.isIE) {
    document.attachEvent("onmousemove", dragGo);
    document.attachEvent("onmouseup",   dragStop);
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS) {
    document.addEventListener("mousemove", dragGo,   true);
    document.addEventListener("mouseup",   dragStop, true);
    event.preventDefault();
  }
}

function dragGo(event) {

  var x, y;

  // Get cursor position with respect to the page.

  if (browser.isIE) {
    x = window.event.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = window.event.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  }
  if (browser.isNS) {
    x = event.clientX + window.scrollX;
    y = event.clientY + window.scrollY;
  }

  // Move drag element by the same amount the cursor has moved.

  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  var newY = dragObj.elStartTop  + y - dragObj.cursorStartY;
  if (newY < -16){
    dragObj.elStartTop = -16;
    newY = -16;
  }
  dragObj.elNode.style.top  = newY + "px";
  
  
  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
  // AY: Hide/show select boxes
  hideOrShowSelectBoxes();
}

function dragStop(event) {

  // Stop capturing mousemove and mouseup events.

  if (browser.isIE) {
    document.detachEvent("onmousemove", dragGo);
    document.detachEvent("onmouseup",   dragStop);
  }
  if (browser.isNS) {
    document.removeEventListener("mousemove", dragGo,   true);
    document.removeEventListener("mouseup",   dragStop, true);
  }
  
}

function hideOrShowSelectBoxes()
{
return;
	var objSel;
	var i;
	
	var arrSelectTags;
	arrSelectTags = document.all.tags("SELECT");

	// show them all before we work out which one to hide 
	for (i = 0; i < arrSelectTags.length; i++)
	{
		objSel = document.all.tags("SELECT")[i];
		objSel.style.visibility = "";
	} 
	
	// now hide the damn things
	var helpDiv;
	
	helpDiv = document.getElementById("FloatingHelp");
	
	var iLeft;
	var iRight;
	var iTop;
	var iBottom;
	
	iHelpLeft = helpDiv.offsetLeft;
	iHelpRight = iHelpLeft + helpDiv.offsetWidth;
	iHelpTop = helpDiv.offsetTop;
	iHelpBottom = iHelpTop + helpDiv.offsetHeight;
	
	var iSelTagsCount = arrSelectTags.length - 1;

	for (i = iSelTagsCount; i >= 0; i--)
	{
		var iSelLeft;
		var iSelRight;
		var iSelTop;
		var iSelBottom;
		
		objSel = arrSelectTags[i];
		
		iSelLeft = objSel.offsetLeft;
		iSelRight = iSelLeft + objSel.offsetWidth;
		
		iSelTop = objSel.offsetTop;
		iSelBottom = iSelTop + objSel.offsetHeight;
	
		// Hide it if it intersects with the dropdown
		if (testIntersection(iSelLeft, iSelRight, iHelpLeft, iHelpRight) && 
			testIntersection(iHelpTop, iHelpBottom, iSelTop, iSelBottom))
		{
			objSel.style.visibility = "hidden";
		} 
	}
}

// Test intersection of this control with others
function testIntersection( iVal1_1, iVal_2, iVal2_1, iVal2_2)
{
	var bRetVal;

	if ((iVal_2 - iVal1_1) >= ( iVal2_2 - iVal2_1))
		bRetVal = ( iVal2_1 >= iVal1_1 && iVal2_1 <= iVal_2 ) || ( iVal2_2 >= iVal1_1 && iVal2_2 <= iVal_2 )
	else
		bRetVal = ( iVal1_1 >= iVal2_1 && iVal1_1 <= iVal2_2 ) || ( iVal_2 >= iVal2_1 && iVal_2 <= iVal2_2 )

	return bRetVal;
}