IE和Chrome中的jQuery同步AJAX调用隐藏了“思考”动画图标

I am having a problem with Internet Explorer showing and hiding the "thinking" icon on synchronous calls. I understand the difference between async and sync, but it should be that synchronous calls allow the image to be displayed, the AJAX to be performed, then image to be hidden. In Firefox the image shows, AJAX is performed, and image disappears... but this does not happen in IE and Chrome.I am having a problem with Internet Explorer sh