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Cross Browser Add Event Listener

/ Published in: JavaScript
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Snatched this from another post and fixed something I found was not working.

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  1. // Cross-browser implementation of element.addEventListener()
  2.  
  3. function listen(evnt, elem, func) {
  4.     if (elem.addEventListener)  // W3C DOM
  5.         elem.addEventListener(evnt,func,false);
  6.     else if (elem.attachEvent) { // IE DOM
  7.          var r = elem.attachEvent("on"+evnt, func);
  8. 	return r;
  9.     }
  10.     else window.alert('I\'m sorry Dave, I\'m afraid I can\'t do that.');
  11. }
  12.  
  13. // Use: listen("event name", elem, func);

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