Cancel bubble

gistfile1.js

elem.onclick = function(e){
     e = e || window.event; // IE's event is window.event
     var target = e.target || e.srcElement; // IE's target is srcElement

     if(target.nodeName !== 'A'){
          return;
     }

     if(typeof e.preventDefault === 'function'){
          e.preventDefault();
          e.stopPropagation();
     }else{ // IE
          e.returnValue = false;
          e.cancelBubble = true;
     }
}