Chrome extension and javascript click/submit error - Programmers Heaven

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Chrome extension and javascript click/submit error

FajkowskyFajkowsky Posts: 2Member
I am making a chrome extension and I am stuck with javascript and pressing button on page. I have site with form like this on web(isn't mine so i can't edit it):


And now I automatically open page with username and password filled but now I want that button will be clicked automatically.

I have code of script:

[code]var tabID = 1;
function(tab) {
tabID =;

chrome.tabs.executeScript(null, {code:clickButton()});

chrome.tabs.getSelected(null, function(tab) {

function sleep(ms) {
var dt = new Date();
dt.setTime(dt.getTime() + ms);
while (new Date().getTime() < dt.getTime());

function clickButton() {
And debugger says:

[code]Uncaught TypeError: Cannot call method 'click' of null[/code]

Thx for any help!
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