function contact_form (form)
{
	if (form.name.value == ""){
		alert( "Please enter your name!" );
		form.name.focus();
		return false ;
	}else if (form.email.value == ""){
		alert( "Please enter your email!" );
		form.email.focus();
		return false ;
	}else if (form.email.value.indexOf('@', 0) == -1 || form.email.value.indexOf('.') == -1) 	{
		alert( "Sorry, your email is invalid!" );
		form.email.focus();
		return false ;
	}else if (form.message.value == "") {
		alert( "Please enter your message!" );
		form.message.focus();
		return false ;
	}else if(form.validator.value == ""){
		alert("Please insert validation code!");
		form.validator.focus();
		return false;
	}else{
		return true ;
	}
}