function resizeBars() {
var bh=document.getElementById('menubar').offsetHeight+document.getElementById('footer').offsetHeight;
var lh=document.getElementById('sidebar').offsetHeight;
var rh=document.getElementById('content').offsetHeight+bh;
var nh = Math.max(lh, rh); 
document.getElementById('sidebar').style.height=nh+"px";
document.getElementById('content').style.height=nh-bh+"px";
}