function test_case(object,text) {
    if (object.value==null || object.value=="") {
         if (text!="") {
		 alert(text);
	 }
     	 return false;
    }
    return true;
}
function test_email(objet,texte) {
    apos=objet.value.indexOf("@");
	dotpos=objet.value.lastIndexOf(".");
    lastpos=objet.value.length-1;
    if (apos<1 || dotpos-apos<2 || lastpos-dotpos>4 || lastpos-dotpos<2) {
      if (texte) {alert(texte);}
	  objet.select();
	  objet.focus();
      return false;
	}
	return true;
}


function validregis() {
    if (test_case(document.form_contact.name,'Indicate your name.')==false) {document.form_contact.name.focus(); return false;};
    if (test_email(document.form_contact.email,'Your email is incorrect.')==false) {document.form_contact.email.focus(); return false;};
    if (test_case(document.form_contact.message,'Nothing in your message!!!.')==false) {document.form_contact.message.focus(); return false;};
    document.form_contact.valeur1.value="enregistrement";
}