function popUpLayer(whichWin) {
	var popupWindow = document.getElementById(whichWin);
	popupWindow.style.visibility = "visible";
}
          
function closeLayer(whichWin) {
	var popdownWindow = document.getElementById(whichWin);
	popdownWindow.style.visibility = "hidden";
}

function isEmpty(element) {
	var str = element.value;
	if (trimAll(element.value)==""){
		return true;
	} 
	else {
		return false;
	}
}

function trimAll(sString) {
	while (sString.substring(0,1) == ' ') {
		sString = sString.substring(1, sString.length);
	}
	while (sString.substring(sString.length-1, sString.length) == ' ') {
		sString = sString.substring(0,sString.length-1);
	}
	return sString;
}

function fnTrapKD(btn, event) {
	var btn = getObject(btn);
	if (document.all) {
		if (event.keyCode == 13) {
			event.returnValue=false;event.cancel = true;btn.click();
		}
	}
	else {
		if (event.which == 13) {
			event.returnValue=false;event.cancelBubble = true;btn.click();
		}
	}
}

function showSidebar() {
	document.getElementById("sidebar_links").style.visibility="visible";
}