Clear controls value using Javascript

Clear states of all controls using Javascript

I am creating a record insert page with textboxes and dropdowns.

When the user clicks "Add", I hope to display a insertion summary
on the top of the page and clear all
fields value using server side

HtmlForm form = (HtmlForm) this.FindControl("Form1");             foreach (Control ctrl in form.Controls)             {                 if (ctrl is TextBox)                     ((TextBox) ctrl).Text = string.Empty;                 else if (ctrl is DropDownList)                     ((DropDownList)ctrl).SelectedIndex = 0;             }

fields value using client  side means Using Javascript

<script language="javascript" type='text/javascript'>         function ClearAllControls()         {               for (i=0; i<document.forms[0].length; i++)               {                     doc = document.forms[0].elements[i];                     switch (doc.type)                     {                         case "text" :                                 doc.value = "";                                 break;                           case "checkbox" :                                 doc.checked = false;                                 break;                              case "radio" :                                 doc.checked = false;                                 break;                                          case "select-one" : doc.options[doc.selectedIndex].selected = false;                                 break;                                                case "select-multiple" :                                 while (doc.selectedIndex != -1)                                 {                                       indx = doc.selectedIndex;                                       doc.options[indx].selected = false;                                 }                                 doc.selected = false;                                 break;                                                              default :                                 break;                     }               }         } </script>