How to make CSS dropdown menu on click to dropdown

问题:

How to make the following css dropdown menu only accept click to dropdown? For example, now when mouse hover "Please Select". The second layer appears. I want to change to when click "Please Select", the second layer appears. Also the click event should apply to second layer menu.

This is a Fiddle

I'm using jquery but don't know how to do this.

The html codes

 <ul class="dropdown">
        <li><a href="#">Please select</a>
            <ul class="sub_menu">
                 <li>
                     <a href="#">Artificial Turf</a>
                     <ul>
                        <li><a href="#">Indoor</a></li>
                        <li><a href="#">Outdoor</a></li>
                    </ul>                    
                </li>
                 <li>
                    <a href="#">Batting Cages</a>
                    <ul>
                        <li><a href="#">Indoor</a></li>
                        <li><a href="#">Outdoor</a></li>
                    </ul>
                 </li>
            </ul>
        </li>
    </ul​

The CSS code

/* 
    LEVEL ONE
*/
ul.dropdown                         { position: relative; }
ul.dropdown li                      { font-weight: bold; float: left; zoom: 1; background: #ccc; }
ul.dropdown a:hover                    { color: #000; }
ul.dropdown a:active                { color: #ffa500; }
ul.dropdown li a                    { display: block; padding: 4px 8px; border-right: 1px solid #333;
                                       color: #222; }
ul.dropdown li:last-child a         { border-right: none; } /* Doesn't work in IE */
ul.dropdown li.hover,
ul.dropdown li:hover                { background: #F3D673; color: black; position: relative; }
ul.dropdown li.hover a              { color: black; }


/* 
    LEVEL TWO
*/
ul.dropdown ul                         { width: 220px; visibility: hidden; position: absolute; top: 100%; left: 0; }
ul.dropdown ul li                     { font-weight: normal; background: #f6f6f6; color: #000; 
                                      border-bottom: 1px solid #ccc; float: none; }

                                    /* IE 6 & 7 Needs Inline Block */
ul.dropdown ul li a                    { border-right: none; width: 100%; display: inline-block; } 

/* 
    LEVEL THREE
*/
ul.dropdown ul ul                     { left: 100%; top: 0; }
ul.dropdown li:hover > ul             { visibility: visible; }​

回答1:

As I noticed in your css you use visibility to show or hide ul-s, so you should use this code

   $(".dropdown li").click(function() { 
        $(this).parent().children("li").not(this).children("ul").css({ "visibility":"hidden" });
        $(this).children("ul").css({ "visibility":"visible" });
    })​

and you should also remove this line from your css

ul.dropdown li:hover > ul { visibility: visible; }​

to close tabs use this code

$('html').click(function() {
   $(".dropdown ul").css({ "visibility":"hidden" });
 });

 $('.dropdown ').click(function(event){
     event.stopPropagation();
 });

last part taken from this stackoverflow question How to detect a click outside an element?

also to fix position change in case of hover out change 2 line in your css to this

ul.dropdown li  { font-weight: bold; float: left; zoom: 1; background: #ccc; position: relative; }