// JavaScript Document

function getClientHeight() {
 
return document.compatMode=='CSS1Compat' || !window.opera?document.documentElement.clientHeight:document.body.clientHeight;
 
}
 
function setTrueHeight() {
 
trueheight = getClientHeight(); 
document.getElementById("box").style.height = (trueheight) + "px";
 
}