$(document).ready( function() {
// set image swap events for all rollovers
$('.rollover').hover(
function() {
$(this).css("backgroundImage",$(this).css("backgroundImage").replace("_up","_over"));
},
function() {
$(this).css("backgroundImage",$(this).css("backgroundImage").replace("_over","_up"));
}
);
// add iehover class to support hover for li
/*if ( jQuery.browser.msie ) {
$('div#nav_main>ul>li').hover(
function() {
$(this).addClass( 'iehover' );
},
function() {
$(this).removeClass( 'iehover' );
}
);
}*/
});

// start preloading hover images after page is done
$(window).bind( 'load', function() {
var imagePaths = new Array();
var numPreloads = 0;
$('.rollover').each( function() {
s = $(this).css("backgroundImage").replace("_up","_over");
imagePaths.push( s );
numPreloads++;
});


for ( var i = 0; i < numPreloads; i++ ){
var img = document.createElement( 'img' );
img.src = imagePaths[i];
}

/*var img = document.createElement( 'img' );
$(img).bind( 'load', function() {
if( preload[0] ) {
this.src = preload.shift();
}
}).trigger( 'load' );*/
});