function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}
function checkform() {
	var nError = 0;
	if ( trim ( document.demandeinfos.surname.value )=='' ) {
		nError = 1;	
		document.demandeinfos.surname.style.background='orange';
	}
	if ( trim ( document.demandeinfos.name.value )=='' ) {
		nError = 1;	
		document.demandeinfos.name.style.background='orange';
	}

	if ( trim ( document.demandeinfos.email.value )=='' ) {
		nError = 1;	
		document.demandeinfos.email.style.background='orange';
	}
	if ( trim ( document.demandeinfos.phone1.value )=='' ) {
		nError = 1;	
		document.demandeinfos.phone1.style.background='orange';
	}

if(nError == 1) {
	return false;	
}else{
	return true;
}

}