// Validate HTML form fields and continue if okay, or deal with issues
function validate_form(thisform) {
	with (thisform) {
		if (validate_required(name,"Please enter your name!")==false) {
			name.focus();return false;
		} else {
			if (validate_email(email,"Not a valid e-mail address!")==false) {
				email.focus();return false;
			} else {
				if (validate_required(message,"Please enter your enquiry!")==false) {
					message.focus();return false;
				}
			}
		}
	}
}

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