如何在javascript中为div添加onclick函数？

Question

I have a piece of javascript is meant to add an onclick event to a div.

The div looks like this:

<div id="deck0" class="deck"></div>

And my javascript has:

var i = 1;
document.getElementById('deck0').SetAttribute("onclick", "begin("+i+")");   

But I get this error:

Uncaught TypeError: Object #<HTMLDivElement> has no method 'SetAttribute' 

Am I doing it right, or is what I am trying to achieve not possible?

Answer 1

Don't use setAttribute to set listeners, not all browsers allow that. Much better to either set the property directly:

document.getElementById('deck0').onclick = begin;

or use addEventListener :

document.getElementById('deck0').addEventListener('click', begin, false);

If you need to pass a parameter, then:

document.getElementById('deck0').onclick = function() {begin(i);};

similarly for addEventListener .

Note that earlier versions of IE don't support addEventListener so you will need a cross–browser function to feature test for support. Where lacking, test for attachEvent and fall back to the direct property method. Search for "addEvent" functions, there are plenty of examples.

Answer 2

Javascript is case-sensitive.
That should be setAttribute .

Answer 3

Javascript is case-sensitive, you'd need to write it lowercase.

Apart from that, to set event listeners no attributes should be used. This would need a string to be evaluated each time - you can do better from a script. Instead, assign a function to the onclick property :

document.getElementById('deck0').onclick = function(event) {
    begin(1);
};

Advanced event registration would be even better, but is more complex because Microsoft lacks supporting the standard.

Answer 4

There are other ways to associate a function to the onclick event :

function deck0_onclick() {
    begin(i);
}

document.getElementById('deck0').onclick = deck0_onclick;

Or directly :

document.getElementById('deck0').onclick = function() {begin(i);}