求解 js出现 WebCalendar.iframe.tableWeek is undefined ，解决~@

求解 js出现 WebCalendar.iframe.tableWeek is undefined ，在线等解决~@
js里的

document.write("<iframe id='meizzCalendarIframe' name='meizzCalendarIframe' scrolling='no' frameborder='0' width='100%' height='100%'><table id='tableWeek' name='tableWeek' ></table></iframe>");

var WebCalendar = new WebCalendar();

function WebCalendar() ｛
this.iframe = window.frames["meizzCalendarIframe"];
this.drag = false; 
｝

//这句错误，怎么回事，自己找了一些没找到解决方法
WebCalendar.iframe.tableWeek.style.cursor = WebCalendar.drag ? "move" : "default";/


------解决方案--------------------
WebCalendar.meizzCalendarIframe.tableWeek.style.cursor = WebCalendar.drag ? "move" : "default";/
试试
------解决方案--------------------
WebCalendar.iframe.tableWeek
tableWeek是iframe下的子元素，这样调用不可