The following example:

jQuery('<div />',{

class : "myclass",

css : {

"position":"absolute",

"left": "10px",

"top" : "10px",

"display" : "none",

"z-index" : "90000"

}

}).appendTo("body");

Not works correctly in any version of IE, instead I use the following code:

jQuery('<div />').

addClass('myclass')

.css({

"position":"absolute",

"left": "10px",

"top" : "10px",

"display" : "none",

"z-index" : "90000"

}).appendTo("body");

The first snipet works cool ;) in Firefox, Chrome, Opera and Safari.