function rollOver(event)  {	
	this.src = this.src.replace(/_out\./,'_over.');
}

function rollOut (event) {	
	this.src = this.src.replace(/_over\./,'_out.');
}

// $(document).ready

window.onload=function(){		
	$(".rollover").hover(rollOver,rollOut);			
};

/*
function showObject(o) {
	var s ="";
	for (var prop in o) {
		s += prop +"\n";
	}
	alert(s);
}
*/