// *********** DRAP DROP ************
// Determine browser and version.

function getXOfElement(oElement) {
    var iReturnValue = 0;
    while (oElement != null) {
        iReturnValue += oElement.offsetLeft;
        oElement = oElement.offsetParent;
    }
    return iReturnValue;
}

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 = 9;

function dragStart(event, id, inputPos) {

  var el;
  var x, y;

  // If an element id was given, find it. Otherwise use the element being
  // clicked on.
  dragObj.inputPos = inputPos;
  
  if (id) {
      dragObj.elNode = $get(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.documentElement.scrollLeft;
      y = window.event.clientY;  // + document.documentElement.scrollTop;  //+ document.documentElement.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 = dragObj.elNode.offsetLeft;
  if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = dragObj.elNode.offsetTop;

  // Update element's z-index.

  dragObj.elNode.style.zIndex = 9;//++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.documentElement.scrollLeft;
      y = window.event.clientY;  //+ document.documentElement.scrollTop + document.documentElement.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";
  dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";

  if (browser.isIE) {
    window.event.cancelBubble = true;
    window.event.returnValue = false;
  }
  if (browser.isNS)
    event.preventDefault();
}

function dragStop(event) {

    if (dragObj.inputPos == "") return;

	//try {
		// save the co-ordinates for postbacks
	    $get(dragObj.inputPos).value = dragObj.elNode.style.left + "," + dragObj.elNode.style.top + "," +
		                               getWindowSize(true) + "," + getWindowSize(false);
	//} catch (e) {}

	// Clear the drag element global.

	dragObj.inputPos = "";
	dragObj.elNode = null;

	// 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 getWindowSize(bWidth) {

	// initialise values
	var myHeight = 0;
	var myWidth = 0;

	if (browser.isIE) {
	    //IE 6+ in 'standards compliant mode'
	    myHeight = document.documentElement.clientHeight;
	    myWidth = document.documentElement.clientWidth;
	}
	if (browser.isNS) {
	    //Non-IE
	    myHeight = window.innerHeight;
	    myWidth = window.innerWidth;
	}
	
	if (bWidth) { return myWidth; } else {return myHeight; }
}

function CombosVisible(cmb, visible) {
	var cmbs = cmb.split(",");

	for (var i = 0; i < cmbs.length; i++) {
		if (cmbs[i] != "") {
		    try {
			    $get(cmbs[i]).style.visibility = (visible ? "visible" : "hidden");
            } catch (e) { }
		}
	}
}