function picSwap(picId, picUrl){
 	document.getElementById(picId).src = picUrl;
}

if (document.images){
preload_image_object = new Image();

image_url = new Array();
image_url[0] = "pics/hout.jpg";
image_url[1] = "pics/header.jpg";
image_url[2] = "pics/footer.jpg";
image_url[3] = "bttn/bttn1a.png";
image_url[4] = "bttn/bttn1b.png";
image_url[5] = "bttn/bttn2a.png";
image_url[6] = "bttn/bttn2b.png";
image_url[7] = "bttn/bttn3a.png";
image_url[8] = "bttn/bttn3b.png";
image_url[9] = "bttn/bttn4a.png";
image_url[10] = "bttn/bttn4b.png";
image_url[11] = "bttn/bttn5a.png";
image_url[12] = "bttn/bttn5b.png";
image_url[13] = "bttn/bttn6a.png";
image_url[14] = "bttn/bttn6b.png";
image_url[15] = "bttn/bttn7a.png";
image_url[16] = "bttn/bttn7b.png";
image_url[17] = "bttn/bttn8a.png";
image_url[18] = "bttn/bttn8b.png";
image_url[19] = "bttn/bttn9a.png";
image_url[20] = "bttn/bttn9b.png";


var i = 0;
for(i=0; i<=20; i++) 
    preload_image_object.src = image_url[i];
}