How to style list items (with same class) individually

please help me to style this list , I need to开发者_如何学运维 set different background image for each list item, but class are same.

<ul>
<li class="sameforall">menu 1</li>
<li class="sameforall">menu 2</li>
<li class="sameforall">menu 3</li>
<li class="sameforall">menu 4</li>
</ul>

I know this one , but it works only for fist item :(

ul:first-child li{
/*my css*/
} 

Why would you give all the li's the same class?

Give the ul a class to style the contained li's, then give the li's their own class, like so:

<ul class="sameforall">
   <li class="one">menu 1</li>
   <li class="two">menu 2</li>
   <li class="three">menu 3</li>
   <li class="four">menu 4</li>
</ul>

.sameforall {color: red;}
   .sameforall .one {background-color: blue;}
   .sameforall .two {background-color: green;}
   .sameforall .three {background-color: pink;}
   .sameforall .four {background-color: purple;}

You can't access the HTML, CSS3 supports :nth-child() psuedo selecting - http://css-tricks.com/how-nth-child-works/

<ul>
   <li class="sameforall">menu 1</li>
   <li class="sameforall">menu 2</li>
   <li class="sameforall">menu 3</li>
   <li class="sameforall">menu 4</li>
</ul>

.sameforall:nth-child(1) { background-color: blue; }
.sameforall:nth-child(2) { background-color: green; }
.sameforall:nth-child(3) { background-color: pink; }
.sameforall:nth-child(4) { background-color: purple; }

Note, this won't work in most old browsers.

I would avoid the use of first-child since it's not fully supported and where it is, it's probably still buggy. In regards to referring to the other elements or childs, your best shot would be to give them a different id and style them using it. Like this:

 <ul class="sameforall">
   <li id='first' >menu 1</li>
   <li id='second'>menu 2</li>
   <li id='third' >menu 3</li>
   <li id='forth' >menu 4</li> 
 </ul>

Then you would refer to those elements in the css file like this:

#first{/*Your css*/}

If you want to see a list of support browsers for the nth-child visit this page it contains a table with some of the most popular browser versions and the support issues they may have with it.

you need :nth-child() btw it should be

ul li:fist-child

Since you can't change the markup and child selecting via CSS is not supported that well, the only way for you is to do it with JavaScript.

<ul>
    <li class="sameforall">menu 1</li>
    <li class="sameforall">menu 2</li>
    <li class="sameforall">menu 3</li>
    <li class="sameforall">menu 4</li>
</ul>
<script type="text/javascript">
    var listItems   = document.getElementsByTagName("ul")[0].getElementsByTagName("li");
    var numChildren = listItems.length; 
    for(var i = 0; i < numChildren; i++) {
        var item = listItems[i]; 

        // -> do whatever you want with each item.
        switch(i) {
            case 0: item.style.backgroundImage = 'url(item-1.gif);'; break;
            case 1: item.style.backgroundImage = 'url(item-2.gif);'; break;
            case 2: item.style.backgroundImage = 'url(item-3.gif);'; break;
        }            
    }
</script>

you need to go with the nth-child method.

Here the stuff is well detailed. Hope this will help you.

http://www.w3.org/TR/css3-selectors/