php - Can :hover apply to generic element tags specific to a parent div? -

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i using bunch of divs (created php) generate block of clickable elements. need apply styles these generic elements, rather specific ones, yet using code below seems invalid. 

#container { height: 80%; width: 60%; background-color: green; } #container div:hover { background-color: blue; }  <div id="container">   <div style="background-color: red; width: 100px; height: 100px;">     </div>

http://jsfiddle.net/xd2ez/

so not sure if issue generic div element cannot styled sub-element , have :hover attribute operates properly. know classes or id's can specified handle this, have thousands of unique divs. cannot use

#container:hover div{ background-color: blue;}

as seems invalid, need select 1 element block, , not @ once.

any ideas here? in advance.

this work if remove background color html, , apply using css:

#container {     height: 80%;     width: 60%;     background-color: green; } #container div {background-color: red;}  #container div:hover {     background-color: blue; }

example: http://jsfiddle.net/xd2ez/1/

the reasone css specificity - style attribute rule more specific (stronger) id + element rule.


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