Finished form generation

form.js

     var el = document.getElementById(id);
     
     var input = {
-        name: getField('form_name', 'Your name', false), // TODO: configurable prefix
-        addr: getField('form_addr', 'Your e-mail address', true),
-        subj: getField('form_subj', 'Your mail\'s subject', false),
-        text: {}
+        name: getField('form_name', 'Your name', false, 'input'), // TODO: configurable prefix
+        addr: getField('form_addr', 'Your e-mail address', true, 'input'),
+        subj: getField('form_subj', 'Your message\'s subject', false, 'input'),
+        text: getField('form_text', 'Your message', false, 'textarea')
     };
     
     // Adding nodes to document
     el.appendChild(input.name);
     el.appendChild(input.addr);
     el.appendChild(input.subj);
+    el.appendChild(input.text);
+    
+    // Adding submit button
+    
+    el.appendChild(getSubmitButton('form_subm', 'Send the mail'));
 }
 
 
 // id: field HTML identifier
 // placeholder: placeholder text
 // email: boolean: is it an email field?
+// type: 'input' or 'textarea'
 // return: a div node containing a label and an input text field
-function getField(id, placeholder, email) {
+function getField(id, placeholder, email, type) {
     var field = document.createElement('div');
     
     field.setAttribute('id', id); // TODO: configurable prefix
-    field.appendChild(getLabel(id, placeholder));
-    field.appendChild(getInputField(id, placeholder, email));
+    field.appendChild(getLabel(id, placeholder, type));
+    field.appendChild(getInputField(id, placeholder, email, type));
     
     return field;
 }
 // Returns a label
 // id: field HTML identifier
 // content: label's inner content
+// type: 'input' or 'textarea'
 // return: a label node the field's description
-function getLabel(id, content) {
+function getLabel(id, content, type) {
     var label = document.createElement('label');
     
-    label.setAttribute('for', id + '_input');
+    label.setAttribute('for', id + '_' + type);
     label.innerHTML = content;
     
     return label;
 // id: field HTML identifier
 // placeholder: placeholder text, field description
 // email: boolean: is it an email field?
+// type: 'input' or 'textarea'
 // return: an input text or email field (depending on "email"'s value') with an
 //         HTML id and a placeholder text
-function getInputField(id, placeholder, email) {
-    var input = document.createElement('input');
+function getInputField(id, placeholder, email, type) {
+    var input = document.createElement(type);
     
-    if(email) {
-        input.setAttribute('type', 'mail');
-    } else {
-        input.setAttribute('type', 'text');
+    if(!type.localeCompare('input')) { // Set input type if input
+        if(email) {
+            input.setAttribute('type', 'mail');
+        } else {
+            input.setAttribute('type', 'text');
+        }
     }
     
     input.setAttribute('required', 'required');
     input.setAttribute('placeholder', placeholder);
-    input.setAttribute('id', id + '_input');
+    input.setAttribute('id', id + '_' + type);
     
     return input;
+}
+
+
+// Returns a submit button
+// id: button HTML identifier
+// text: button text
+// return: a div node containing the button
+function getSubmitButton(id, text) {
+    var submit = document.createElement('div');
+    
+    submit.setAttribute('id', id);
+    
+    var button = document.createElement('button');
+    
+    button.setAttribute('type', 'submit');
+    button.setAttribute('id', id);
+    // Disable button's default action
+    button.setAttribute('onSubmit', 'return false;');
+    
+    button.innerHTML = text;
+    
+    submit.appendChild(button);
+    
+    return submit;
 }