Beginning JavaScript with DOM Scripting and Ajax, 2nd Edition

Chapter 5 ■ Presentation and Behavior (CSS and Event Handling)
if (e && e.stopPropagation && e.preventDefault){
e.stopPropagation();
e.preventDefault();
}
}
Using these helper methods should allow you to handle events unobtrusively and across browsers.
The way around this for versions of Safari prior to 5.1 is to add another dummy function via the old onevent
syntax that stops the link from being followed. You’ll see this fix in action now. Let’s take the collapsing headline
example again and replace the DOM-3–compliant methods and properties with the cross-browser helpers:
xBrowserListItemCollapse.js used in exampleXBrowserListItemCollapse.html
newshl = {
// CSS classes
overClass:'over', // Rollover effect
hideClass:'hide', // Hide things
currentClass:'current', // Open item
init:function(){
var ps,i,hl;
if(!document.getElementById || !document.createTextNode){return;}
var newsList = document.getElementById('news');
if(!newsList){return;}
var newsItems = newsList.getElementsByTagName('li');
for(i = 0;i