UI Date picker is rendering when clicking its image icon...in IE9 Only

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jQuery

jQuery-UI

In my Page i used stay or leave page conformation.all other browsers support this but not IE9.when i click datepicker image icon the pop up displayed. my code is,

$(window).bind("beforeunload", function () {
    if (DATA_CHANGED) {
        DATA_CHANGED = false;
        return "All unsaved data will be lost. Please save your data before you navigate to other page";        
    }
});
$(document).change("input[type='text'],input[type='radio'],input[type='checkbox'],select,textarea", function () {
    DATA_CHANGED = true;
});
$(document).on("focusin", "#AgreementDateFrom,#AgreementDateTo", function () {
    DATA_CHANGED = true;
});