clear all cotrol values of a page

<script type="text/javascript">
    function allclear()
    {    //debugger
        var elements=document.getElementsByTagName("INPUT");
        for(i=0;i<elements.length;i++)
            if(elements[i].type=="radio")
                elements[i].checked=false;
        for(i=0;i<elements.length;i++)
            if(elements[i].type=="checkbox")
                elements[i].checked=false;
        for(i=0;i<elements.length;i++)
           if (elements[i].type=="text")
                elements[i].value="";
        var elements1=document.getElementsByTagName("SELECT");
        for(i=0;i<elements1.length;i++)
            if(elements1[i].id!="" && elements1[i].id!=null)
                elements1[i].selectedIndex=0;
     }
</script>
---------------------------------------------------------------------------------------
private void ClearControls(Control c)
    {
        if (c.GetType() == typeof(System.Web.UI.WebControls.TextBox))
            ((TextBox)c).Text = "";
        if (c.GetType() == typeof(System.Web.UI.WebControls.RadioButtonList))
        {
            RadioButtonList rbtl = (RadioButtonList)c;
            for (int j = 0; j < rbtl.Items.Count; j++)
                rbtl.Items[j].Selected = false;
        }
        if (c.GetType() == typeof(System.Web.UI.WebControls.DropDownList))
            ((DropDownList)c).SelectedIndex = 0;
        if (c.GetType() == typeof(System.Web.UI.WebControls.RadioButton))
            ((RadioButton)c).Checked = false;
        foreach (Control child in c.Controls)
            ClearControls(child);
}

------------------------------------------------------------------------------------------------------------------------

  private void DisableControls(Control c)
    {
        if ((c is TextBox) || (c is LinkButton) || (c is Button) || (c is CheckBox) || (c is CheckBoxList) || (c is RadioButtonList) || (c is DropDownList) || (c is Panel) || (c is ImageButton))
        {
            ((WebControl)c).Enabled = false;
        }
        foreach (Control child in c.Controls)
            DisableControls(child);
    }