How to use handleEvent()

[forrozeiro]

Hi,

I have a text input like this:

[input type=text name=a onChange=b()]

When I call document.forms[0].a.handleEvent('onChange') I get the error 'The object does not support this method or property' (or something like that).
What did I do wrong ?

Thank you in advance.

 

[xutopia]

just use :

document.forms[0].a.onchange = function(){ // code here }

See if that works. Gary

http://www.xutopia.com

Haran

 

[forrozeiro]

xutopia,

I am afraid that's not what I want. Rather than defining the event handler for the onChange event I would like to call the event handler already defined for that control.

Thanks anyway.

 

[jemminger]

forrozeiro,

if you're already binding onchange to b() in the html tag, why do you need to do it again in script? you're wanting function b() to be called by form element "a" onchange, right?

 

[forrozeiro]

jemminger,

That's because function b() is called only when the input's value is changed by the user. If the value is changed via code, b() is not called. See:

//this does not trigger a call to b() :
form.a.value = '1';
form.a.value = '2';

I´ve just found a solution. I just need to do this:

form.a.onchange();

That is because I am writing code that may change a field's value but doesn´t know which are the event handlers that must be called on the field being changed. In other words, I need a way to trigger the event handlers without having to know which they are. That is because the code I am writing will be a js utility library which can be used in several places.

Thank you and sorry by my English.