// JavaScript Document

function HeightClm()
{
	var getH;
	
	if(document.documentElement.clientHeight){
		getH = document.documentElement.clientHeight;
		}else{
		getH = screen.height;
		}
	var getHeight = document.getElementById('bdy1').offsetHeight;
	var setHeight = getHeight - 4;
		//alert("OK");
	document.getElementById('bdy2').style.height = setHeight + "px";
	document.getElementById('bdy3').style.height = setHeight + "px";
	document.getElementById('bdy4').style.height = setHeight + "px";
	//alert("ottieni altezza: " + getHeight);
}
window.onload = HeightClm;