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Why Doesn't input.setAttribute("onblur", "myFunction(this)") Work in IE?

Posted on 2007-12-06
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Last Modified: 2013-11-19
I am dynamically creating elements and want to set onblur to do something, this works in FF but not IE,

input.setAttribute("onblur", "myFunction(this)")

So basically the node will look something like this in the end:

<input type="text" onblur="myFunction(this)">

Is there an easy fix?
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Question by:dignified
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5 Comments
 
LVL 8

Expert Comment

by:kebabs
ID: 20418442
You have to use input.onblur unfortunately

IE interprets what you have as input[onblur] = "myFunction(this)" with the JS as a string.
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Author Comment

by:dignified
ID: 20418459
That doesn't work using

input.onblur = "myFunction(this)"

This is going to be annoying then to try and get the "this" to perform properly. I may have to change the code to use a cloneNode(true)
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LVL 8

Accepted Solution

by:
kebabs earned 125 total points
ID: 20418472
Yep, I think this is the closest you can get:

input.onblur = myFunction;

What is it you are trying to achieve with this scripting? I think a different approach is needed.
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LVL 8

Expert Comment

by:kebabs
ID: 20418507
I didn't suggest addEventListener because it is not well supported but forgot I tackled this same issue earlier. If you are interested, here is the cross browser compatible function I use. It invokes addEventListener, attachEvent or a pseudo method I conjured up that I use for this sort of stuff. Should work in your case.

e.g.
addEvent('input', 'blur', 'myFunction');

function myFunction(evt) {
// ...

Also see:
http://www.captain.at/howto-addeventlistener-attachevent-parameters.php
function addEvent(ele, event, callback) {
  if (typeof(ele) == "string")
    ele = byId(ele);
  if (ele.addEventListener) {
    ele.addEventListener(event, callback, false);
  } else if (ele.attachEvent) {
    ele.attachEvent("on"+event, callback);
  } else {
    psuedoAttachEvent(ele, event, callback);
  ele["on"+event] = function() { psuedoTriggerEvents(ele, event) };
  }
}
 
function psuedoAttachEvent(ele, event, callback) {
  if (!ele.psuedoEvents) ele.psuedoEvents = {};
  if (!ele.psuedoEvents[event]) ele.psuedoEvents[event] = [];
  ele.psuedoEvents[event][ele.psuedoEvents[event].length] = callback;
}
 
function psuedoTriggerEvents(ele, event){
  if (ele && ele.psuedoEvents && ele.psuedoEvents[event])
    for (var i=0, len=ele.psuedoEvents[event].length; i<len; i++)
      ele.psuedoEvents[event][i]();
}

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Author Comment

by:dignified
ID: 20418612
thanks a lot. Actually what I did was had a dummy template node with the onblur already in there and set it to display:none

and then I clone it and change the id to make it unique.

Thanks for your help
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