function LineItemValidation_Update(elementid, url)
{
    var pattern = /^\d+$/;
    if(!pattern.test(elementid.value))
    {
        elementid.style.backgroundColor = "#eedee2";
        elementid.style.borderColor = "#c6909d";
        elementid.style.borderWidth = "3";
        document.getElementById('showBanner').style.display="";
    }
    else
    {
        window.location = url + '&quantity=' + elementid.value
    }
}