function validateform(theform) {

if (theform.name.value == "") { 
alert("Please write your name.");
theform.subject.focus();
return false;
}
if (theform.email.value == "") { 
alert("Please write your email.");
theform.email.focus();
return false;
}
var email = document.cont.email.value;
  pattern = new RegExp( '^([a-zA-Z0-9\\-\\.\\_]+)(\\@)([a-zA-Z0-9\\-\\.]+)([\\.])([a-zA-Z]{2,4})$' );
     if ( !pattern.test(email) ) {
     alert("Incorrect email address format.");
	 return false; }
if (theform.subject.value == "") { 
alert("Please write subject.");
theform.subject.focus();
return false;
}
if (theform.message.value == "") { 
alert("Please write message.");
theform.message.focus();
return false;
}
var word = document.cont.word.value;
if (word.length == 0) {
  alert("Skopiuj słowo z generatora haseł.");
return false; }
}