// JavaScript Document
function add_handler(obj, evt, handler, captures) 
{ 
	if (obj.addEventListener) 
			obj.addEventListener(evt, handler, captures); 
	else if (obj.attachEvent) 
					obj.attachEvent('on' + evt, handler); 
	else 
	{ 
	   evt = 'on' + evt;
	   var old_handler = obj['on' + evt]; 
	   if (null == old_handler) 
		 obj[evt] = handler; 
	   else obj[evt] = function(e) 
	   { 
		 old_handler.call(this, e); 
		 handler.call(this, e); 
	   }
	} 
	
}
function log_out()
{
	ht = document.getElementsByTagName("html");
	ht[0].style.filter = "progid:DXImageTransform.Microsoft.BasicImage(grayscale=1)";
	if (confirm('Are you sure you want to log out?'))
	{
		return true;
	}
	else
	{
		ht[0].style.filter = "";
		return false;
	}
}

function disableForm() {
	var w = 480, h = 340; 
	if (document.all || document.layers) { 
	   w = screen.availWidth; 
	   h = screen.availHeight; 
	}
	var nHeight = 100; 
	var nWidth = 400; 
	var nXpos = (w/2) - nWidth; 
	var nYpos = (h/2) - nHeight; 

	//ht = document.getElementsByTagName("html");
	//ht[0].disabled = true;
	document.getElementById('maincontent').disabled = true;
	var divs = document.getElementsByTagName('div'); 
	for (i=0;i<divs.length;i++){
			divs[i].style.zIndex = 0;
		}
	document.getElementById('wait').style.zIndex = 1;
	document.getElementById('wait').style.left = nXpos;
	document.getElementById('wait').style.top = nYpos;
	document.getElementById('wait').style.visibility = 'visible';
}
function enableForm() {
	//ht = document.getElementsByTagName("html");
	//ht[0].disabled = false;
	document.getElementById('maincontent').disabled = false;
	document.getElementById('wait').style.visibility = 'hidden';
}