function NewWindow(mypage, myname, w, h, scroll) {
    var winl = (screen.width - w) / 2;
    var wint = (screen.height - h) / 2;
    winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
    win = window.open(mypage, myname, winprops);
    if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

function changeImage(img)
{
    document.getElementById("hidvalue").value=img;
}

function viewLarge()
{
    var imageId = document.getElementById("hidvalue").value;
    var newImage = "/Public/productEnlarge/" + imageId + ".jpg";
    NewWindow(newImage,'productView','600','600','no');
}