The question says it all! I am looking for an easy to use alternative of blockUI for jQuery. I've been trying for days to center a dialog box with blockUI in both FireFox and IE but no chance. It doesn't work. I looked at this question about centering a blockUI dialog box (How can I get a DIV to centre on a page using jQuery and blockUI?) but it works only with Firefox.
you might want to check this plugin call jQuery MSG. It works great in most of the browsers including ie6. And it is very light weight, only 4k uncompressed with code comments.
// this will block the page and shows a `please wait` message
$.msg();
// you can change the content by the following code
$.msg({
content : '<img src="loading.gif"/> Sending mail :)'
});
Source code on github
Full documentation and usage please check this post
or if you just want to centralize some DOM element you can take a look at this jQuery Center plugin