[removed] IE event.preventDefault is null or not an object

Question

My code works fine in FF/Chrome/Everything except IE(failed in both 7/8, didn\'t bother going furthur down). Due to restrictions, I cannot use jQuery and am hard-coding the

Answer 1

In IE the event object is not passed as the first argument to an event handler. Instead it is a global variable:

function mousedown(e){
 var evt = e || window.event; // IE compatibility
 if(evt.preventDefault){  
  evt.preventDefault();  
 }else{  
  evt.returnValue = false;  
  evt.cancelBubble=true;  
 }
 //Processing   
};

Answer 2

IE has a different event model to other browsers (even IE8). In IE you would call this to do the same thing:

event.returnValue = false;

You need to determine what the browser supports and call the correct method. So first check if event.returnValue is set, if so then call it, otherwise call preventDefault().