//bubble-tooltip driver
       function showToolTip(e,text){
	        if(document.all)
	        e = event;
	        var obj = document.getElementById('bubble_tooltip');
	        var obj2 = document.getElementById('bubble_tooltip_content');
	        obj2.innerHTML = text;
	        obj.style.display = 'block';
	        var st = Math.max(document.body.scrollTop,document.documentElement.scrollTop);
	        if(navigator.userAgent.toLowerCase().indexOf('safari')>=0)st=0; 
	        var leftPos = e.clientX - 100;
	        if(leftPos<0)leftPos = 0;
	        obj.style.left = leftPos + 'px';
	        obj.style.top = e.clientY - obj.offsetHeight -1 + st + 'px';
        }	
        function hideToolTip()
        {
	        document.getElementById('bubble_tooltip').style.display = 'none';
        }