function  advance_load(){
	var dir = "images"
	var before_dir = new Array(
		"./",
		"../"
	);
	var imgs = new Array(
	"mainleft/search-map_swap1.jpg",
	"mainleft/search-map_swap2.jpg",
	"mainleft/search-map_swap3.jpg",
	"mainleft/search-map_swap4.jpg",
	"mainleft/search-map_swap5.jpg",
	"mainleft/search-map_swap6.jpg",
	"mainleft/search-map_swap7.jpg"
	);
	var i;
	var j;
	for(i = 0;i < imgs.length;i++){
		for(j = 0;j < before_dir.length;j++){
			var imgObj = new Image();
			imgObj.src = before_dir[j] + dir + "/" + imgs[i];
			if(imgObj.complete == true){
				break;
			}
		}
	}
}
if(window.addEventListener){
	window.addEventListener("load",advance_load,false);
}else if(window.attachEvent){
	window.attachEvent("onload",advance_load);
}