function over() { this.src = this.src.replace(/_off\./, "_on."); }
function out() { this.src = this.src.replace(/_on\./, "_off."); }
function spanover() { 
	this.style.filter = this.style.filter.replace(/_off\./, "_on.");
}
function spanout() { 
	this.style.filter = this.style.filter.replace(/_on\./, "_off.");
}
$('#menubar .menu img').each(function() {
	this.onmouseover = over;
	this.onmouseout = out;
});
$('img.login').each(function() {
	this.onmouseover = over;
	this.onmouseout = out;
});