function setpagelength2() {  
econtent = document.getElementById('main');  
esidebar = document.getElementById('sidebar');  
hc = econtent.clientHeight;  
hs = esidebar.clientHeight;	
nl = Math.max(hc,hs);	
nl = nl + 20;	
nl = Math.max(nl, 400);  
econtent.style.height = nl+'px';  
esidebar.style.height = nl+'px';
}