function loadevents(){
	var table = document.getElementById("tab1"); 
	var lis = table.getElementsByTagName("td");
	
	for (var i=0;i<lis.length;i++) {
		lis[i].onmouseover = function (){
		this.className ="colourHov";
		
		}
		lis[i].onmouseout = function (){
		this.className ="colour";
		
		}
	
	}
	var high = document.getElementById("tab2").offsetHeight;
	document.getElementById("tab3").style.height = high+"px";
	document.getElementById('td1').vAlign="top";
}