Disable link using javascript

Question

I have following HTML and would like to disable the link using javascript.

Answer 1

document.getElementById("uc_ii_lnkInstall").onclick = function() { return false; };

The return value of false in the old-style event handler prevents the default action (i.e. loading the javascript: URL).

If you want to gray out the image link, you would also need to swap out the image's src URL with one pointing to a grayed-out version of the icon and change the text's color using .style.color = "gray";.