function showButtonBusy(btnE)
{
    return showButtonBusyStyle(btnE, "url(_images/_project_images/back-button_grey.gif)");
}
function showButtonBusyLarge(btnE)
{
    return showButtonBusyStyle(btnE, "url(_images/_project_images/back-largebutton_grey.gif)");
}
function showButtonBusyStyle(btnE,imgurl)
{
    if(btnE)
    {
        btnE.style.backgroundColor="#666666";
        btnE.style.backgroundImage=imgurl;
        btnE.style.border = "1px solid #999999";
    }
    return true;
}
function checkValidSetBusy(btnE,validationGroupName)
{
    var retVal=false;
    Page_ClientValidate(validationGroupName)
    if(Page_IsValid)
    {
        showButtonBusy(btnE);
        retVal=true;
    }
    return retVal;
}
function checkValidSetBusyLarge(btnE,validationGroupName)
{
    var retVal=false;
    Page_ClientValidate(validationGroupName)
    if(Page_IsValid)
    {
        showButtonBusyLarge(btnE);
        retVal=true;
    }
    return retVal;
}