window.onload = setScreenClass; 
	window.onresize = setScreenClass;

	function setScreenClass(){
document.getElementById("sod_left").style.height = (document.documentElement.clientHeight-164)+"px";
document.getElementById("sod_right").style.height = (document.documentElement.clientHeight-164)+"px";
document.getElementById("center_chat").style.height = (document.getElementById("sod_left").clientHeight-406)+"px"; };