function initializePage()
{
    var hh = document.getElementById("header").offsetHeight;
    var mh = document.getElementById("headerMenu").offsetHeight;
    var ph = document.getElementById("pageContent").offsetHeight;
    document.getElementById("shadow").style.height = (hh + mh + ph) + "px";
    rotateImage();
}


function rotateImage() 
{ 
    theimages = new Array("images/header1.gif", "images/header2.gif", "images/header1.gif", "images/header4.gif", "images/header5.gif", "images/header6.gif"); 
    whichimage = Math.floor(Math.random()*theimages.length);
    //alert(document.getElementById("header").id);
    document.getElementById("header").style.backgroundImage = "url('" + theimages[whichimage] + "')"; 
}