function equaliser()
{
	try {
		var div1 = document.getElementById("main");
		var div2 = document.getElementById("rightcol");
	
		height1 = div1.offsetHeight;
		height2 = div2.offsetHeight;
	
		if(height1 > height2){
			div2.style.height = height1+"px";
		}
		else{
			div1.style.height = height2+"px";
		}
	}
	catch(err){
		// hence wont display js error if two divs above dont exist
	}
}