function validateOnSubmit(thisform)
{
	var elem;
	var errs=0;
	// execute all element validations in reverse order, so focus gets set to the first one in error.
	var formname = thisform;
	if (formname == 'emailform')
	{
  		// if required enter third argument as 'true' otherwise enter false
		if (!validateEmail(document.forms.emailform.email,  'inf_email', true)) errs += 1;
		if (!validateEmail(document.forms.emailform.returnemail,  'inf_returnemail', true)) errs += 1;

	} // end if emailform

	if (errs>1)  alert('There are fields which need correction before sending');
	if (errs==1) alert('There is a field which needs correction before sending');
	return (errs==0);
};