$(document).ready(function() {

// Button rollovers		   
    $(".rollover").each(function() {
		var srcImage = $(this).attr("src");
		// var rolloverImage = srcImage.replace(".", "_over.");
		// slight change to above line of code, to fix the images not appearing on rollover when on pages in lower-level folders
		var rolloverImage = srcImage.replace(".gif", "_over.gif");
		jQuery("<img>").attr("src", rolloverImage);
	    $(this).hover(
			function() {
				$(this).attr("src", rolloverImage);
			},
			function() {
				$(this).attr("src", srcImage);
			}
		);

    });
	
});