function show_module(element,height){
	if (document.getElementById(element).style.visibility=="hidden"){
		document.getElementById(element).style.visibility="visible";
		document.getElementById(element).style.height=height+"px";
	} else {
		document.getElementById(element).style.visibility="hidden";
		document.getElementById(element).style.height="0";
	}
}

function show_element(element){
	if (document.getElementById(element).style.display=="none"){
		document.getElementById(element).style.display="block";
	} else {
		document.getElementById(element).style.display="none";
	}
}