Learn how to use $(this) selector and children

By admin|Computer, jQuery

If you want to select img tag and modify values of it.

<div id="known_id"><img src="..."></div>

The jQuery constructor accepts a 2nd parameter which can be used to override the context of the selection.

$('#known_id').click(function(){
    var img = jQuery("img", this);
});

Which is the same as

$('#known_id').click(function(){
    var img = jQuery(this).find("img");
});

If the imgs are direct descendants of the clicked element, you can also use:

$('#known_id').click(function(){
    var img = jQuery(this).children("img");
});