function offHighlight() {
	if (!document.getElementsByTagName) return false;
	var links = document.getElementsByTagName("a");
	for (var i=0; i<links.length; i++) {
		links[i].style.backgroundColor = "";
		links[i].style.borderColor = "";
		links[i].style.borderStyle = "";
	}
}

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

function addClass(element, value) {
	if (!element.className) {
		element.className = value;
	} else {
		var newClassName = element.className;
		newClassName += " ";
		newClassName += value;
		element.className = newClassName;
	}
}

function replaceClass(element, valueOff, valueOn) {
	if (!element.className) {
		element.className = valueOn;
	} else {
		var currentClassName = element.className;
		newClassName = currentClassName.replace(valueOff, "");
		newClassName += " ";
		newClassName += valueOn;
		element.className = newClassName;
	}
}