function chimg(filename,target){
	document.images[target].src = filename;
}

function preloadimg(){
	preloadimg = new Array();
	for(i = 0; i < preimages.length; i++){
		preloadimg[i] = new Image();
		preloadimg[i].src =  preimages[i];
	}
}

function preloadimg2(){
	preloadimg2 = new Array();
	for(i = 0; i < preimages2.length; i++){
		preloadimg2[i] = new Image();
		preloadimg2[i].src =  preimages2[i];
	}
}

function preloadimg3(){
	preloadimg3 = new Array();
	for(i = 0; i < preimages3.length; i++){
		preloadimg3[i] = new Image();
		preloadimg3[i].src =  preimages3[i];
	}
}