//<![CDATA[
function checkform ()
{
	var formaa = document.getElementById('forma');
  if (formaa.name.value == "") {
    alert( "Please enter your name." );
    formaa.name.focus();
    return false;
  }
  if (formaa.email.value == "") {
    alert( "Please enter your email address." );
    formaa.email.focus();
    return false;
  }
  if (formaa.subject.value == "") {
    alert( "Please enter subject." );
    formaa.subject.focus();
    return false;
  }
  if (formaa.message.value == "") {
    alert( "Please enter your message." );
    formaa.message.focus();
    return false;
  }
  if (formaa.email.value != "") {
		if (!isValidEmail(formaa.email.value)) {
			alert( "Your email adress is incorect." );
			formaa.email.value = "";
			formaa.email.focus();
			return false;
		}
  }
  function isValidEmail(str) {
	  return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  }
  formaa.submit();
}
//]]>