function preloadImages(urls){
 var img = new Array();
 for (var i=0; i<urls.length; i++) {
 img[img.length] = new Image();
 img[img.length - 1].src = urls[i]; 
 }
}

function StartSequencesLanding(){
var img = new Array("landing_images/bkk_default.png", "landing_images/bkk_glow.png", "landing_images/usa_default.png", "landing_images/usa_glow.png");
preloadImages(img);
}

function ChangePic(name, url){
if (document.images[name]){
	document.images[name].src = url;
}
}