image - Is it possible to change img src attribute using css? -

i'm trying change img src (not background img src) css

<img id="btnup" src="img/btnup.png" alt="btnup"/>    #btnup{     cursor:pointer; } #btnup:hover{     src:img/btnuphover; /* possible ? elegant way.*/ } 

no - css can used change css background images, not html content.

in general ui elements (not content) should rendered using css backgrounds anyway. swapping classes can swap background images.