if (!jQuery){
	var errMsg="jQuery is required for this script to work properly.\nPlease install jQuery 1.2 or higher.";
	alert(errMsg);
	throw new Error(errMsg);
}

jQuery.noConflict();

function rollon() {
	jQuery(this).src = jQuery(this).src + '_on';
}
function rolloff() {
	jQuery(this).src.replace('_on', '');
}
function init_rollovers() {
	jQuery('img.imgover').hover(rollon, rolloff);
}
jQuery(document).ready(init_rollovers);