function addLoadEvent(func)
{
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}



var myimages=new Array();
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages=new Image();
myimages.src=preloadimages.arguments;
}
}
preloadimages("../images/menubg.png","../images/menubgactive.png","../images/menubghover.png","../images/sidebaractive.png");