function verif_saisie(){

	var valide=0;
	
	if(document.getElementById('btr_vente').checked)
		valide++;
	else if(document.getElementById('btr_location').checked)
		valide++;
	else {
		document.getElementById('btr_vente').style.backgroundColor="#ffdfdf";
		document.getElementById('btr_location').style.backgroundColor="#ffdfdf"; }

	if(document.getElementById('budget_min').value.length>0)
		valide++;
	else
		document.getElementById('budget_min').style.backgroundColor="#ffdfdf";
	
	if(document.getElementById('budget_max').value.length>0)
		valide++;
	else
		document.getElementById('budget_max').style.backgroundColor="#ffdfdf";
	
	if(document.getElementById('nom').value.length>1)
		valide++;
	else
		document.getElementById('nom').style.backgroundColor="#ffdfdf";
	
	if(document.getElementById('email').value.length>5)
		valide++;
	else
		document.getElementById('email').style.backgroundColor="#ffdfdf";
	
	if(document.getElementById('telephone').value.length>=10)
		valide++;
	else
		document.getElementById('telephone').style.backgroundColor="#ffdfdf";
	
	if(valide<6){
			alert("Veuillez saisir correctement la totalite des champs annotes d'un asterisque rouge.");
			return false;
		}
		else{
			return true;
		}

}