function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

window.onload= function(){
    MM_preloadImages(
					 '/images/home_over.png',
					 '/images/about_over.png',
					 '/images/help_over.png',
					 '/images/archive_over.png',
					 '/images/contact_over.png'
		);
};