event attach on only one child in parent
HTML
<div id = "parent">
<div id = "child1" class='child_div'>Child1</div>
<div id = "child2">Child2</div>
</div>
CSS
#child1{
background-color:#ff0000;
width:100px;
height:100px;
}
#child2{
background-color:#00ff00;
width:100px;
height:100px;
}
JavaScript
$(document).ready(function(){
$('.child_div').click(function(e){
alert($(e.target).prop('id') + ' clicked');
});
});