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 myDragObj;
var dragObj = new Object();
dragObj.zIndex = 0;

var latest_zIndex;

function dragStart_float(event, obj) {
  
  var el;
  var x, y;
  var id;
  
  id = obj.id;
    
  // 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 (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
  if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;

// Update element's z-index.
//dragObj.elNode.style.zIndex = ++dragObj.zIndex;
  dragObj.elNode.style.zIndex = 100000;
  
//alert(dragObj.elNode.style.zIndex);
// Capture mousemove and mouseup events on the page.

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

function dragGo_float(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.
	//alert(dragObj.elNode.id);
  
  //dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  //dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";
  
  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX);
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY);
  
  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
}

function dragStop_float(event) 
{
	// Stop capturing mousemove and mouseup events.
	isMouseDown = false;
	
	if(dragObj.elNode.id == "div_tree")
	{
		if(eval(dragObj.elNode.style.left.substr(0,dragObj.elNode.style.left.length-2)) < 175)
		{
			dragObj.elNode.style.left = 11;
			dragObj.elNode.style.top = 1;
			document.getElementById("td_workflow_canvas").width = "76%";
		}
		else
		{
			document.getElementById("td_workflow_canvas").width = "100%";
		}
	}
	
	if (browser.isIE) 
	{
		document.detachEvent("onmousemove", dragGo_float);
		document.detachEvent("onmouseup",   dragStop_float);
	}
	if (browser.isNS) 
	{
		document.removeEventListener("mousemove", dragGo_float,   true);
		document.removeEventListener("mouseup",   dragStop_float, true);
	}
}