/// PRELOADER
    var i = 0;
    imageObj = new Image();
    images = new Array();

    images[0]="/images/header/header_1.jpg";
    images[1]="/images/header/header_3.jpg";
    images[2]="/images/header/header_4.jpg";
    images[3]="/images/header/header_5.jpg";
    for(i=0; i<=3; i++) 
    {
         imageObj.src=images[i];
    }