function getEventTarget(evt) {	
	if (isIE()) {
		return event.srcElement;
	} else {
		return evt.target;
	}
}

function isIE() {
	return (navigator.userAgent.toLowerCase().indexOf("msie") >= 0);
}

function uncheckAll(fieldName) {
	var frm = document.forms[0];
	
	for (var e=0; e<frm.elements.length; e++) {
		if (frm.elements[e].name == fieldName) {
			frm.elements[e].checked = false;
		}
	}
}