var url = 'captcheck.php?code='; 
var captchaOK = 2; // 2 - not yet checked, 1 - correct, 0 - failed 
var http = GetXmlHttp();

function handleHttpResponse() { 	
	if (http.readyState == 4) { 
		captchaOK = http.responseText; 
		if(captchaOK != 1) { 
			alert('Le code du captcha n\'est pas correct'); 
			selectObj('code').value=''; 
			selectObj('code').focus(); 
			return false; 
		}
		poster_com()
	} 
} 

function checkcode(thecode) { 
	http.open("GET", url + escape(thecode), true); 
	http.onreadystatechange = handleHttpResponse; 
	http.send(null); 
} 

function checkform() {
	var com=selectObj('Commentaire').value;
	com=str_replace("&"," ",com);
	var pseudo=selectObj('Prenom').value;
	if(com=="") {
		alert("Ton commentaire est vide");
		selectObj('Commentaire').focus();
		return false;
	} else if(pseudo=="") {
		alert("Tu dois entrer ton prénom");
		selectObj('Prenom').focus();
		return false;
	} else if(selectObj('code').value=='') { 
		alert('Tu dois recopier le code inscrit dans l\'image');
		selectObj('code').focus(); 
		return false; 
	}
	checkcode(selectObj('code').value); 
	return false; 
}