function colHeight(){
var col1 = document.getElementById('content-col2').clientHeight;
var col2 = document.getElementById('midBanner').clientHeight;
var col3 = document.getElementById('content-bottom').clientHeight;
document.getElementById('main-menu').style.height=parseInt(col1)+parseInt(col2)+parseInt(col3)-8+"px";
var col4 = document.getElementById('content-bottom-box1').clientHeight;
var col5 = document.getElementById('content-bottom-box2').clientHeight;
if(col4>col5)document.getElementById('content-bottom-box2').style.height=parseInt(col4)+"px";
else document.getElementById('content-bottom-box1').style.height=parseInt(col5)+"px";
}