function checkformu(){
	var msg = '';
	var lemail = document.getElementById("email").value;
	var lenom = document.getElementById("nom").value;
	var letel = document.getElementById("tel").value;
	
	if(lemail == '') msg += "Email obligatoire.\n";
	if(lenom == '') msg += "Nom obligatoire.\n";
	if(letel == '') msg += "Téléphone obligatoire.\n";
	
	 form = document.forms['detailform'];
	  inputs = form.getElementsByTagName("input");
	  count = 0;
	  for(i=0 ; i<inputs.length ; i++){
	    if(inputs[i].type=="checkbox" && inputs[i].checked==true){
		 
		 if(inputs[i].id != "souh"){
			  count++;
			 
		 }
		}
	  }
	  if(count == 0) msg += 'Merci de choisir au minimum un prestataire';
	  
	  if(msg != '') alert(msg);
	else form.submit();
}