$(document).ready(function()
{	
	$('img.overButton').mouseover(onMouseOver);
	$('img.overButton').mouseout(onMouseOut);
});

function onMouseOver()
{
	var file = $(this).attr("src");
	var filetype = file.substr(-4);
	file = file.substr(0, file.length - 4);
	$(this).attr("src", file +'Over.png');
}

function onMouseOut()
{
	var file = $(this).attr("src");
	var filetype = file.substr(-4);
	file = file.substr(0, file.length - (4 + 4));
	$(this).attr("src", file  + '.png');
}