add files linked with login

UNGProject/js/login.js

+/**
+ * change the display if the new account button is clicked
+ */
+var displayNewAccountForm = function(bool) {
+    if(bool) {
+        $("table#create-new-user").css("display","table");
+        $("table#field_table").css("display","none");
+        $("table#new-account-table").css("display","none");
+    }
+    else {
+        $("table#create-new-user").css("display","none");
+        $("table#field_table").css("display","table");
+        $("table#new-account-table").css("display","table");
+    }
+}
+
+/**
+ * Log an user with it's Name and ID provider
+ */
+var logUser = function() {
+    var name = $("input#name").attr("value");
+    var IDProvider = $("input#id_provider").attr("value");
+    if(name) {
+        setCurrentStorage(IDProvider ? new JIOStorage(name,IDProvider) : new LocalStorage(name));
+        window.location = "ung.html";
+    }
+}
+
+/**
+ * create an account (to use only if UNG is also an ID provider)
+ */
+var createNewUser = function() {
+    var form = $("form#create-user")[0];
+
+    /* check that the form is complete */
+    for(var i = 0; i<form.length-1; i++) {
+        if(!form[i].value) {formError("please fill each field");}
+    }
+    if(form[4].value!=form[5].value) {
+        formError("please enter the same password twice");
+        form[4].value="";
+        form[5].value="";
+    }
+    if(!testEMail()) {formError("please enter a valid email");}
+    
+    /* create the new user */
+    //JIO
+}
+
+/**
+ * Report an error when filling the form
+ */
+var formError = function(message) {
+    $("td#form-message").attr("value",message);
+    $("td#form-message").css("display","table-cell");
+}
+
+/**
+ * check if an email address is valid
+ */
+function testEMail(email) {
+    var patern="^([a-zA-Z0-9]+(([\.\-\_]?[a-zA-Z0-9]+)+)?)\@(([a-zA-Z0-9]+[\.\-\_])+[a-zA-Z]{2,4})$";
+    var regEx = new RegExp(patern);
+    return regEx.test(email);
+}
+
+function setFocus() {
+  login = document.getElementById('name');
+  password = document.getElementById('password');
+  if (login.value != '')
+    password.focus();
+  else
+    login.focus();
+}
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