String.prototype.Trim = function()  
{  
return this.replace(/(^\s*)|(\s*$)/g, "");  
}
function update(index,qty,addcom,btn)
{
    var result = GetResultString("aspx4ajax/vcupdate.aspx?index="+index+"&qty="+qty+"&ac="+escape(addcom));
    if(result.indexOf("fail")==-1)
        btn.disabled=true;
    alert(result);
}
function remove(index,btn)
{
    var result = GetResultString("aspx4ajax/vcdel.aspx?index="+index);
    //if(result.indexOf("fail")==-1)
            //btn.parentElement.parentElement.style.display="none";
    alert(result);
    location = "viewcart.aspx";
}