// JavaScript Document

function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
		alert(alerttxt);
		return false;
    }
  else
    {
    return true;
    }
  }
}

function validate_id(field,alerttxt) {
	with (field) {
		if (value==null||value=="") {
			alert(alerttxt);
			return false;
		} else if (value.length > 20 || value.length < 8) {
			alert("The order Id you have entered is not valid");
			return false;
		} else {
			return true;
		}
	}
}

function validate_email(field,alerttxt)
{
with (field)
  {
  apos=value.indexOf("@");
  dotpos=value.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {alert(alerttxt);return false;}
  else {return true;}
  }
}


function validate_form(thisform) {
	with (thisform) {
		if (validate_required(realname, "Please enter your name")==false) {
		  realname.focus();
		  return false;
		}
		if (validate_id(orderid, "Please enter your Order ID")==false) {
		  orderid.focus();
		  return false;
		}
		if (validate_email(email, "Please enter your email address")==false) {
		  email.focus();
		  return false;
		}
	}
}