[jQuery] Using append() - each element or string of HTML?

[Kaitlyn]

Just wondering from an efficiency standpoint:

I am building a widget out of javascript and so there is a lot of
HTML. Am I better off creating it as a string, then append() it into
the document, or should I build the widget itself using append() and
other related helper functions?

[jQuery] Problem animating with marginLeft...

[Kaitlyn]

I have this:

$('#mydiv').animate({marginLeft:100}, 500);

it works just fine in Firefox and Safari. In IE (6 and 7) I get
"Invalid argument". If I use this instead:

$('#mydiv').css({marginLeft:100});

It works in ALL browsers, including IE.

What's wrong? The comment above the animate() function even uses
marginLeft as an example

[jQuery] How to animate percentage?

[Kaitlyn]

how do I make something like this:

$('#element').animate({marginLeft:25}, 500);

by percent, instead of 25 pixels?