function checkField(obj,lg,champ) {
	//this.value.length
	//alert(obj.type+" "+obj.name);
	switch (champ) {
		case "txt":
			ok =  obj.value.length>=lg;
			break;
			
		case "email":
			ok = testMail(obj.value);
			break;
			
		case "equal":
			ok = (obj.value==lg.value);
			break;
	}
	
	
	if (!ok) {
		eval("document.check_"+obj.name+".src='images/check0.gif'");
		//alert(document.tab_field_ok['Nom_contact']);
		document.tab_field_ok[obj.name]=undefined;
	}
	else {
		eval("document.check_"+obj.name+".src='images/check1.gif'");
		//alert (document.tab_field_ok.length);
		document.tab_field_ok[obj.name]=1;
		//alert(document.tab_field_ok['Nom_contact']);
	}
}

function checkForm(nb_total) {
	nb_ok=0;
	for (var i in document.tab_field_ok) {
		if (document.tab_field_ok[i]==1) {
			nb_ok = nb_ok+1;
		}
	}
	if (nb_ok<nb_total) {
		alert ("Certains champs sont obligatoires");
		//alert(nb_ok);
		return false;
	}
	return true;
}

function testMail(lemail) {
	//var lemail ="" + lemail;
	//for(var k = 0; k < lemail.length;k++) {
		return ( (lemail.lastIndexOf("@")>-1) && (lemail.lastIndexOf(".") > lemail.lastIndexOf("@")) && (lemail.lastIndexOf(".")+2<lemail.length) );
		//if(lemail.substring(k,k+1) == "@") {
		//	return true;
		//}
	//}
	//return false;
}