function setLayout(){
ct_H=getid('Content').clientHeight;
cr_H=getid('copyright').clientHeight;
bd_H=document.body.clientHeight;

if(ct_H<bd_H){
getid('Content').style.height=(bd_H-cr_H-30-20)+'px';
}
}

var orgOnload=window.onload || function(){};
window.onload=function (){
orgOnload();
setLayout();
}