var left_div="left";
var right_div="right";
function change(id1,id2){
	var con1=document.getElementById(id1);	
	var con2=document.getElementById(id2);	
	if(con1.offsetHeight<con2.offsetHeight){
		con1.style.height=con2.offsetHeight+"px";		
	}
	else {
		con2.style.height=con1.offsetHeight+"px";		
	}
}