function checkform()
{
	if( document.form1.name.value == "" ) {
		alert("You forgot to specify your name");
		return false;
	}
	if( document.form1.content.value == "" ) {
		alert("You forgot to leave your message");
		return false;
	}
	if( document.form1.email.value != "" ) {
		if( !checkmail(document.form1.email.value) ) {
			alert("Please, enter e-mail, for example, name@company.com");
			return false;
		}
	}	
	return true;
}