function visibl() {
 eval("document.getElementById('"+visibl.arguments[0]+"').style.display=('"+visibl.arguments[1]+"')");
 eval("document.getElementById('"+visibl.arguments[2]+"').style.display=('"+visibl.arguments[3]+"')");
}
function show_and_hide(targetid) {
	if (document.getElementById) {
		target = document.getElementById(targetid);
		if (target.style.display == "none") {
			target.style.display = "";
		} else {
			target.style.display = "none";
		}
	}
}