function ShowBigImage(imgUrl, imgWidth, imgHeight)
{  
    if(imgUrl && imgWidth && imgHeight)
    {
        var height = document.getElementById("maintable").offsetHeight;
     
        var blockUI = document.getElementById("blockUI");
        blockUI.style.height = height + "px";
        blockUI.style.display = "block";
        
        var popup = document.getElementById("imagePanel");
        popup.style.display = "block";
        popup.style.marginLeft = - imgWidth / 2 + "px";
        popup.style.marginTop = - imgHeight / 2 + "px";
        
        var image = document.getElementById("bigImage");
        image.src = imgUrl;
        
        window.scrollTo(0,0);
    }
}

function HideBigImage()
{
    var popup = document.getElementById("imagePanel");
    popup.style.display = "none";
    
    var blockUI = document.getElementById("blockUI");
    blockUI.style.display = "none";
    
    var image = document.getElementById("bigImage");
    image.src = "../../Media/Images/Empty.gif";
}