// cacule la hauteur de la fenetre
function GetColHeight() {
 /*
	RightMenuH = document.getElementById("left").offsetHeight;
	CenterH = document.getElementById("center").offsetHeight;
	if(CenterH > RightMenuH) {
		//alert(CenterH);
		document.getElementById("right").style.height = CenterH+"px";
	}
	else	{
		//alert(RightMenuH);
		document.getElementById("right").style.height = RightMenuH-50+"px";	
	}
	*/
}