// Determine browser and version.
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 = 0;

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.
	popup_Y = document.getElementById(id).offsetTop + 30;
	click_Y = y;
	
	if (popup_Y  > click_Y  ) {//--- pentru ca MOVE sa actioneze numai la bara de sus a formei si nu pentru toata forma ----
		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 + 1;
		
		// 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";
	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) {
	// 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 makeCentered(div_id)
{ 
  obj = document.getElementById(div_id);
  height = obj.style.height;
  height = height.replace("px","");
  height = height.replace("%","");
  width = obj.style.width;
  width = width.replace("px","");
  width = width.replace("%","");
  if (window.screen) {
    if (height.length > 0)
    {
      if (browser.isIE)
      {
        scroll = document.documentElement.scrollTop;
      }
      if (browser.isNS)
      {
        scroll = window.scrollY;
      }
      var ah = screen.availHeight;
      var yc = (ah - height) / 2 + scroll;
      obj.style.top = ''+yc+'px';
    }
    if (width.length > 0)
    {
      var aw = screen.availWidth;
      var xc = (aw - width) / 2;
      obj.style.left = ''+xc+'px';
    }
  }
}

function ClosePopup(popup_id)
{
  var popup_obj = document.getElementById(popup_id);
  popup_obj.parentNode.removeChild(popup_obj);
}