addEventListener

[MonkeyMargie]

I've tried this:
var elmLink = document.getElementById('MyFieldName');
elmLink.addEventListener("click", sayhello('world'), true);
but it seems to execute only when the page is loaded, not when I click on the field. I've tried other actions such as 'mousemove', 'change', etc., but nothing works. Help!

[MonkeyMargie]

[Andre Gerdts]

sayhello is executed when the call to addEventlistener is executed. You
need to supply a function pointer ...

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[Brian L. Matthews]

addEventListener accepts a function as its second argument, which is
called when the event occurs. Instead of *passing* a function, you're
*calling* the function sayhello, and passing sayhello's return value to
addEventListener (which is probably undefined, so clicks, or whatever
event you use, are effectively ignored). Instead try:

elmLink.addEventListener("click", function(){sayhello('world');}, true);

That creates an anonymous function and passes it to addEventListener.
When the element is clicked, the browser calls the anonymous function,
which then calls sayhello.

Brian

[MonkeyMargie]

Thanks! That has definitely gotten me closer and my 'Hello World' pop-up works, but of course that's not what I really need to do. I have a form that has field text that is too small so I change the field size for the boxes that I'm going to type in. This is my code to do that:

 

function changeFont(myID)
{
myID.style.font = "18px arial";
}

allTextareas = document.getElementsByTagName('*');
for (var i = 0; i < allTextareas.length; i++)
{   
  thisTextarea = allTextareas[i];

(thisTextarea.name == 'myfield')
  {
  changeFont(thisTextarea);
  }

The problem is that when I select items from certain lists and translatable fields, the font reverses to the original font. I'm trying to add code to switch it back after the user updates the field (or to be safe, right now I'm using mousemove, so it should happen a lot). This is my code:

 

var elmLink = document.getElementById('listboxfield');
elmLink.addEventListener("mousemove", function(){changefont(thisTextarea);}, true);

I'm not really sure what to put in my changefont function since I'm updating a text box, not the 'listboxfield' that has its mousemove setting. Sorry, I'm very new at JavaScript. I'd appreciate any help I can get.

 

 

On Thursday, July 12, 2012 1:02:36 PM UTC-4, MonkeyMargie wrote:

[MonkeyMargie]

Actually, I've solved the problem in my previous post. It's definitely changing the font back once I edit the listbox field, but then it refreshes again and I lose it. It seems to work only the first time I mousemove, change, etc. in the field, and then it won't change the font again after.

On Thursday, July 12, 2012 1:02:36 PM UTC-4, MonkeyMargie wrote: