/****************************************** Simple String Validation */
function isValid(string,vstring)
{
         if(vstring == "alpha") { var regex = /^([a-z])+$/; }
    else if(vstring == "ALPHA") { var regex = /^([A-Z])+$/; }
    else if(vstring == "Alpha") { var regex = /^([a-zA-Z])+$/; }
    else if(vstring == "ANum")  { var regex = /^([a-zA-Z0-9\.])+$/; }
    else if(vstring == "num")   { var regex = /^([0-9])+$|^([0-9])+(\.)?([0-9])*$/; }
    else if(vstring == "$")     { var regex = /^([0-9])+(\.)?([0-9])?([0-9])?$/; }
    else if(vstring == "email") { var regex = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/; }
    else if(vstring == "phone") { var regex = /^\(?\d{3}\)?(\-| |\.)?\d{3}(\-| |\.)?\d{4}$/; }
    else if(vstring == "ssn")   { var regex = /^\d{3}\-?\d{2}\-?\d{4}$/; }
    else if(vstring == "url")   { var regex = /^http:\/\/([a-zA-Z0-9_\.\-])+\.+([a-zA-Z0-9_\.\-])/; }
    else if(vstring == "zip")   { var regex = /^(\d{5})(-(\d{4}))?$/; }
    else var regex = vstring;
    return regex.test(string);
}