function validate(field) {
			with (field)
				{
				if (value==null||value=="")
				{ alert('Alle velden moeten ingevoerd worden!');return false }
				else {return true}
				}
			}	

		function validate_form(thisform) {
			with (thisform)
			{
			if (validate(textinput) == false || validate(passwordinput) == false || validate(textareainput) ==  false)
			{email.focus();return false}
			}
		}