A Comparison Between IE7 and ff3.5.

$ (JSON). Each (function (I ){
If (I> 1 ){
Lc = $ ("<Div class = 'divcontent'> </div>" Maid ("Min-width", gridwidth );
Vertex (jsonpolici=.txt align). Each (function (j ){
$ ("<Span>" + JSON [I]. data [J] + "</span>" ).appendto(lc0000.css ("text-align", jsonpolici2.16.txtalign?j=).css ("width", parseint (JSON [0]. titlewidth [J]);
});
}
});

Today, we found that the previously written drag grid is very slow under IE, I is 20 rows, and J is about 11 columns.
The aboveCodeIn IE7, the execution time is very slow, which is about 5 seconds. Ff3.5 is very fast and requires about 1 ~ 2 seconds... It is estimated that IE and FF are executed differently when the appendto statement is executed.
How can I optimize ie faster when executing such statements?