using jquery findset css for img tag code example
Example 1: jquery change image src
//change image src with jquery
$("#myImageID").attr("src","images/my_other_image.png");
//change image src plain javascript
document.getElementById('myImageID').src="images/my_other_image.png";
Example 2: change image src jquery
$(document).ready(function () {
$('img').click(function(){
$(this).attr('src','images/download.jpeg')
})
})