var iframeContent = $("#<%= iframeID %>").contents();
iframeContent.off("mouseover", "#divImgSize").on("mouseover","#divImgSize", function() {
//some code
});
this function working normal, but
iframeContent.off("mouseout", "#divImgSize").on("mouseout", "#divImgSize", function(event) {
//some code
});
or
iframeContent.off("mouseleave ", "#divImgSize").on("mouseleave ", "#divImgSize", function(event) {
//some code
});
working in Firefox, Chrome, but not Internet Explorer.