IE8标准 z-index_html/css_WEB-ITnose

 <div class="whead positionR"><div class="l">                    <div class="cb height10">                         </div>                    <div class="cb height5">                         </div>                    <div class="cb">                        <div id="_calendarTool" class="l hm">                            <a href="#">                                <img src="images/calendar_orange.png" border="0" alt="日历" /></a></div>                        <div class="l span20">                             </div>                    </div>                    <div id="calendarDiv" class="cb positionA hiddenDisplay padding5 backgroundWhite"                          style="max-width:90%">                        <div id="_calendarDiv" class="cb calendarDiv backgroundWhite">                            日历加载...</div>                    </div>                </div>                <div class="clear">                </div>            </div><div>给这个div 挡住了  <table></table></div>