jquery stop child triggering parent event

I have a div which I have attached an onclick event to. in this div there is a tag with a link. When I click the link the onclick event from the div is also triggered. How can i disable this so that if the link is clicked on the div onclick is not fired?

script:

$(document).ready(function(){
    $(".header").bind("click", function(){
         $(this).children(".children").toggle();
    });
})

html code:

<div class="header">
    <a href="link.html">some link</a>
    <ul class="children">
        <li>some list</li>
    </ul>
</div>

Do this:

$(document).ready(function(){
    $(".header").click(function(){
        $(this).children(".children").toggle();
    });
   $(".header a").click(function(e) {
        e.stopPropagation();
   });
});

If you want to read more on .stopPropagation(), look here.

Or, rather than having an extra event handler to prevent another handler, you can use the Event Object argument passed to your click event handler to determine whether a child was clicked. target will be the clicked element and currentTarget will be the .header div:

$(".header").click(function(e){
     //Do nothing if .header was not directly clicked
     if(e.target !== e.currentTarget) return;

     $(this).children(".children").toggle();
});

Better way by using on() with chaining like,

$(document).ready(function(){
    $(".header").on('click',function(){
        $(this).children(".children").toggle();
    }).on('click','a',function(e) {
        e.stopPropagation();
   });
});