function CheckKeyword()
{
    obj = document.getElementById("<%= txtKeyword.ClientID %>");
    if (obj)
    {
        if (obj.value == '')
        {
            alert('Please enter search keyword');
            obj.focus();
            return false;
        }
    }
    return true;
}
function checkEnter(evt,objControl)
    {
    objControl=document.getElementById("<%=ibtnSearch.ClientID %>");
     if (navigator.appVersion.indexOf("MSIE")!=-1)
        {        
            if(event.keyCode == 13) 
            {                    
                objControl.click();
                objControl.focus(); 
                event.returnValue = false;
            }
        }
        else
        {
              var charCode = (evt.which) ? evt.which : evt.keyCode
                if (charCode == 13)
                {                    
                    objControl.click();                    
                    //return false;
                }
                else
                {
                    return true;
                }
        }
        return true;
        //alert(objEvt)
        //return false;
    }