function Provjera(){
	var bOk=true;

	window.document.getElementById('grIme').style.display='none';
	window.document.getElementById('grEmail').style.display='none';
	window.document.getElementById('grNaslov').style.display='none';
	window.document.getElementById('grPoruka').style.display='none';


	if(window.document.getElementById('name').value==""){
		window.document.getElementById('grIme').style.display='';
		bOk=false;
	}
	
	if(window.document.getElementById('email').value.search("@") == -1 || window.document.getElementById('email').value.search("[.*]") == -1){
		window.document.getElementById('grEmail').style.display='';
		bOk=false;
	}

	if(window.document.getElementById('naslov').value==""){
		window.document.getElementById('grNaslov').style.display='';
		bOk=false;
	}
	
	if(window.document.getElementById('message').value==""){
		window.document.getElementById('grPoruka').style.display='';
		bOk=false;
	}

	if(!bOk)
		window.document.getElementById('grForm').style.display='';

	return bOk;


}