When window.parent calls the parent frame, IE is incompatible with Firefox_javascript skills

Original code: (normal in IE, window.parent step is not run in Firefox at all)

Copy code The code is as follows:

<script> <br>function oa_tool1(){ <br>window.parent.mm.rows="20,200,10,*"; <br>} <br></script&gt ; <br> </div> <br>Modify the code: (normal in IE and Firefox) <br><div class="codetitle"> <span><a style="CURSOR: pointer" data="38263" class="copybut" id="copybut38263" onclick="doCopy('code38263')"><u>Copy the code</u></a></span> The code is as follows :</div> <div class="codebody" id="code38263"> <br><script> <br>function oa_tool1(){ <br>window.parent.document.getElementById("mm").rows="20,200,10,*"; <br>} <br></script>

Reason:
In principle, the modified code is correct code, and the original code is an error code, just because ie The fault tolerance is strong, so there will be no mistakes.
Prevention:
When we write code, we must try our best to standardize the code.