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js_select_handler.class.php：Code Content

							<?php
class js_select
{
    // form name
    var $form_name;
    
    // the select name in form
    var $select_name;
    
    // the dropdown name to show  : the first element
    var $menu_name;
    
    function add($name,$js_function)
    {
        $this->options[] = array('name' => $name, 'function' => $js_function);
    }
    
    function add_separator()
    {
        $this->options[] = array('name' => '', 'function' => '');
    }    
    
    function render_js_function()
    {
        echo "function perform_action_".$this->select_name."()n";
        echo "{n";
        echo "    pagetype = parent.main_content.document.pagetype.type.value;n";
        echo "    if (pagetype != 'filelist')n";
        echo "    {n";
        echo "        alert('impossible to perform action on that page!');n";
        echo "        document.".$this->form_name.".".$this->select_name.".selectedIndex = 0;n";
        echo "        return false;n";
        echo "    }n";        
        echo "    action_to_perform = document.".$this->form_name.".".$this->select_name.".selectedIndex;n";
        echo "n";
        $i=1;
        foreach ($this->options as $id =>$option_array)
        {
            echo "    if (action_to_perform == $i)  { ".$option_array['function']." } // action ".$option_array['name']."n";
            $i++;
        }
        echo "    document.".$this->form_name.".".$this->select_name.".selectedIndex = 0;n";
        echo "}n";
    }
    
    function render_html_select($css_style='')
    {
        if ($css_style) $css_style = ' class="'.$css_style.'"';
        echo "  <select name=".$this->select_name." onChange="perform_action_".$this->select_name."()"$css_style>n";
        echo "    <option value=0>".$this->menu_name."</option>n";// blank value
        foreach ($this->options as $id =>$option_array)
        {
            echo "    <option value=$i>".$option_array['name']."</option>// function ".$option_array['function']."n";
            $i++;
        }        
        echo "  </select>n";
    }    
}

						