var preloaded = new Array();
preload(
    'images/pic_head_1.gif',
    'images/pic_head_2.gif',
    'images/pic_head_3.gif',
    'images/pic_head_4.gif',
    'images/pic_head_5.gif',
    'images/pic_head_6.gif',
    'images/pic_head_7.gif',
    'images/pic_head_8.gif',
    'images/pic_head_9.gif'
);
function preload(){
    for(var i = 0; i < arguments.length; i++){
        preloaded[i] = document.createElement("img");
        preloaded[i].setAttribute("src", arguments[i]);
    }
};