preventDefault not working in Google Chrome 5

I want to stop a form submit button from reloading a page. This works in Firefox 3.6, Safari 5, and Opera. But Chrome 5 does not prevent the link.

Here is the form.

<form class="container_7" id="find-store-all" action=" ">
 <label for="customer-loc" class="grid_3">Find a Store Near You:</label>
 <input name="customer-loc" id="customer-loc" class="开发者_Go百科grid_3" type="text" placeholder="zip code or address"  />
    <button type="submit" id="customer-loc-sub" class="grid_1" >Enter</button>
</form>

I am using event delegation to manage the click. Here is the JavaScript.

document.onclick = handleClick;

function handleClick(e){
 if(!e) var e = window.event; 
 var target = e.target || e.srcElement;

 switch(target.id){
  case "customer-loc-sub" :
  e.preventDefault();
  findClosestStoreOne();
  break;
 }

}

Any suggestions would be appreciated.

preventDefault() isn't the best way to prevent the browser's default behaviour in this type of DOM 0 event handler, as it certainly doesn't work in IE and possibly other browsers too. Just use return false; instead. Works in all browsers.

document.onclick = handleClick;

function handleClick(e){
 if(!e) var e = window.event; 
 var target = e.target || e.srcElement;

 switch(target.id){
  case "customer-loc-sub" :
  findClosestStoreOne();
  return false;
 }
}

Solved this. There are another event (the entire script is about 900 lines) that was affecting this. Thanks for your help. Especially Ryan Kinal. His comment's got me to look at the problem from another angle...so to speak.