Question

Following line doesn’t work in FF 5.

<a href="javascript:func1(upDiv);">Resend Pin</a>
<div id="upDiv">ASDFGHJKL</div>

JS function

function func1(windowname) {
    alert(windowname);
}

It works in Google Chrome and even in IE8.

Answer 1

IE and Chrome have the (bad) habit of creating a global variable for each element with an ID which refers to that element.

Pass a string and use getElementById instead:

<a href="javascript:func1('upDiv');">Resend Pin</a>

function func1(windowname) {
    alert(document.getElementById(windowname));
}

Also, don’t use the javascript: pseudo protocol. Either refer to a proper location so that it works if JS is disabled or use a button, and attach an event handler for the click event. E.g.

<button onclick="func1('upDiv');">Resend Pin</button>

You can style the button as a link if you really want to.