On using jquery animation you can get very slow effect on MSIE8.
You can fix it by:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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