function handleClick(id) {
	var obj = "";

		// Check browser compatibility
		if(document.getElementById)
			obj = document.getElementById(id);
		else if(document.all)
			obj = document.all[id];
		else if(document.layers)
			obj = document.layers[id];
		else
			return 1;

		if (!obj) {
			return 1;
		}
		else if (obj.style)
		{
			obj.style.display = ( obj.style.display != "none" ) ? "none" : "";
		}
		else
		{
			obj.visibility = "show";
		}
}

function mypopup (url) {
 fenster = window.open(url, "fenster1", "status=yes,scrollbars=yes,resizable=yes");
 fenster.focus();
}