IMG SRC tags and JavaScript

Question

Is it possible to call a JavaScript function from the IMG SRC tag to get an image url?

Like this:

Answer 1

how about this?

var imgsBlocks = new Array( '/1.png', '/2.png', '/3.png');
function getImageUrl(elemid) {  
var ind = document.getElementById(elemid).selectedIndex;
document.getElementById("get_img").src=imgsBlocks[ind]; 
}

it's not work?