// Global object to hold drag information.
var browser;
var dragObj = new Object();
dragObj.zIndex = 600;

function positionElement(trigger_element, target_element)
{
  var trigger = document.getElementById(trigger_element);

  var target  = document.getElementById(target_element);

  var x = findPosX(trigger);

  var y = findPosY(trigger);
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  if  (x > myWidth - 100) x = myWidth - 200;
  var posx = x + 'px';

  var posy = y + 'px';
  target.style.top = posy;
  target.style.left = posx;
}

function positionElement1(target_element)
{
  var target  = document.getElementById(target_element);

  var x = findPosX(target);

  var y = findPosY(target);
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  if  (x > myWidth - 100) x = myWidth - 200;
  var posx = x + 'px';

  var posy = y + 'px';
  target.style.top = posy;
  target.style.left = posx;
}

function mD(id, e) {
    positionElement1(id);
	var el;
  	var x, y;
	
  	if (window.event) {
		e=window.event;
		browser = "IE";
	}

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

  if (id) {
    dragObj.elNode = document.getElementById(id);
  } else {
	dragObj.elNode = e.srcElement;
  }
  
  // Get cursor position with respect to the page.

  if (browser == "IE") {
    x = e.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = e.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  } else {
    x = e.clientX + window.scrollX;
    y = e.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;

  // Capture mousemove and mouseup events on the page.

  if (browser == "IE") {
    document.attachEvent("onmousemove", dragGo);
    document.attachEvent("onmouseup",   dragStop);
    e.cancelBubble = true;
    e.returnValue = false;
  } else {
    document.addEventListener("mousemove", dragGo,   true);
    document.addEventListener("mouseup",   dragStop, true);
    e.preventDefault();
  }
}

function dragGo(e) {

  var x, y;

  // Get cursor position with respect to the page.

  if (browser == "IE") {
    x = e.clientX + document.documentElement.scrollLeft
      + document.body.scrollLeft;
    y = e.clientY + document.documentElement.scrollTop
      + document.body.scrollTop;
  } else {
    x = e.clientX + window.scrollX;
    y = e.clientY + window.scrollY;
  }

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

  dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";

  if (browser == "IE") {
    e.cancelBubble = true;
    e.returnValue = false;
  } else {
    e.preventDefault();
    }
}

function dragStop(event) {

  // Stop capturing mousemove and mouseup events.

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