var x,y;
			function tip(header) { 
				var t; 
				t=document.getElementById("tip"); 
				
				if (window.opera) { 
				x=window.event.clientX+15; 
				y=window.event.clientY-10; 
				} else if (navigator.appName=="Netscape") {
				document.onmousemove=function(e) { x = e.pageX+15; y = e.pageY-10; return true}
				} else { 
				x=window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft + 15; 
				y=window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop - 10; 
				} 
				
				t.innerHTML='<table class=\'tip_table\' \><tr class=\'tip_header\'\><td\>'+header+'</td\></tr\><\/table\>';
				if (screen.width-x<150) x-=150; 
				t.style.left=x + "px"; 
				t.style.top=y + "px"; 
			} 
				
			function h_tip() { 
				var t; 
				t=document.getElementById("tip"); 
				t.innerHTML=""; 
				t.style.left="-1000px"; 
				t.style.top="-1000px"; 
			} 


			function aToolTip(event,id)
			{
				document.getElementById("tt").innerHTML = id;
				popUp(event,'tt');
			}