function openDialog(elementId) {
	element = document.getElementById(elementId);
	element.style.visibility = "visible";
	
	marginTop = (-1) * (150);
	if (document.documentElement.scrollTop) {
		marginTop = marginTop /*+ document.documentElement.scrollTop*/;
	} else {
		marginTop = marginTop /*+ document.body.scrollTop*/;
	}
	
	element.style.marginTop = marginTop+"px";
}

function closeDialog(elementId) {
	var element = document.getElementById(elementId);
	var children = element.childNodes;
	element.removeChild(children[0]);
	element.style.visibility = "hidden";
}