Hope to help me find bugs

[zhuzhengyu]

I write two html files to realize the target:<br>1.function:<br>when I select the ADD_NEW item in the &lt;select&gt; ,a new window pop up and wait for the info input. then a new item added.<br>2.method:<br>I use two arrays to make relations between every window poped up and &lt;select--ADD_NEW&gt;<br>3.defect:<br>when I close the window poped up manually problem may occurs:the global varible and the related window lose the relation<br>I have tried my best to clear garbage varables,But still bugs:<br>eg:in IE4.0,when I use ADD_NEW to open several windows and then close them manually.Error happens when the last window to be closed will .<br><br>here is my code of html:<br><br>&lt;html&gt;<br>&lt;head&gt;<br>&lt;title&gt;Untitled Document&lt;/title&gt;<br>&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8859-1&quot;&gt;<br>&lt;script language=&quot;JavaScript&quot;&gt;<br>var myWind=new Array(100); //handle of every modify-window<br>var my=new Array(100); //handle of every &lt;select&gt;<br><br>var idTime;<br>function doLoad(){<br> idTime=setInterval(&quot;poll()&quot;,100);<br><br> for(var i=0;i&lt;100;i++){<br> myWind<i>=0;<br> my<i>=0; <br> }<br>}<br><br>function doUnload(){<br> clearInterval(idTime);<br>}<br><br>function doNew(it){<br> if(it.options[it.selectedIndex].text=='ADD_NEW'){<br> var exist=0;<br> for(var i=0;i&lt;100;i++){<br> if((my<i>==it)&&(myWind<i>!=0)&&(!myWind<i>.closed)){<br> myWind<i>.focus();<br> exist=1;<br> break;<br> }<br> }<br> if(exist==0){<br> for(var i=0;i&lt;100;i++){<br> if((myWind<i>==0)¦¦((myWind<i>!=0)&&(myWind<i>.closed))){<br> my<i>=it;<br> myWind<i>=window.open(&quot;new.htm&quot;,&quot;name&quot;+i);<br> break;<br> }<br> }<br> }<br> }<br>}<br><br>function poll(){<br> //clear debris<br> for(var i=0;i&lt;100;i++){<br> if((myWind<i>.closed)){<br> myWind<i>=0;<br> my<i>=0;<br> }<br> }<br> for(var i=0;i&lt;100;i++){<br> if((my<i>!=0)&&(!myWind<i>.closed)){<br> var value=myWind<i>.document.form1.submit.value;<br> if(value=='ok'){<br> doAdd(i);<br> break; <br> }<br> }<br> }<br>}<br><br>function doAdd(k){<br> if(myWind[k]!=0){<br> var select=my[k];<br> var length=select.length;<br> var selection=new Array(length);<br><br> for(var i=0;i&lt;length;i++){<br> selection<i>=select.options<i>.text;<br> }<br><br> select.length=0;<br> for(var i=0;i&lt;length-1;i++){<br> select.options<i>=new Option(selection<i>);<br> } <br> <br> select.options[length-1]=new Option(myWind[k].document.form1.text1.value);<br> select.options[length]=new Option(&quot;ADD_NEW&quot;<br> <br> myWind[k].close();<br><br> my[k]=0;<br> myWind[k]=0;<br><br> }<br>}<br>function show(){<br> var str=&quot;&quot;;<br> for(var i=0;i&lt;5;i++){<br> str+=&quot;my&quot;+i+&quot;:&quot;+my<i>+&quot;----&quot;+&quot;myWind&quot;+i+&quot;:&quot;+myWind<i>+&quot;----&quot;+(myWind<i>.closed)+&quot;\n&quot;;<br> }<br> window.alert(str);<br>}<br>&lt;/script&gt;<br>&lt;/head&gt;<br><br>&lt;body bgcolor=&quot;#FFFFFF&quot; onLoad=doLoad() onUnload=doUnload()&gt;<br>&lt;form name=&quot;form1&quot;&gt;<br>&nbsp;&nbsp;&lt;input type=button value=test onClick=show() name=&quot;button&quot;&gt;<br>&nbsp;&nbsp;&lt;select name=&quot;menu1&quot; onChange=doNew(this) &gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;a&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;b&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;ADD_NEW&lt;/option&gt;<br>&nbsp;&nbsp;&lt;/select&gt;<br>&nbsp;&nbsp;&lt;select name=&quot;menu2&quot; onChange=doNew(this) &gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;a1&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;b1&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;ADD_NEW&lt;/option&gt;<br>&nbsp;&nbsp;&lt;/select&gt;<br>&nbsp;&nbsp;&lt;select name=&quot;menu3&quot; onChange=doNew(this) &gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;a2&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;b2&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;ADD_NEW&lt;/option&gt;<br>&nbsp;&nbsp;&lt;/select&gt;<br>&nbsp;&nbsp;&lt;select name=&quot;menu4&quot; onChange=doNew(this) &gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;a2&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;b2&lt;/option&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&lt;option&gt;ADD_NEW&lt;/option&gt;<br>&nbsp;&nbsp;&lt;/select&gt;<br>&lt;/form&gt;<br>&lt;/body&gt;<br>&lt;/html&gt;<br><br>and here attached the html file &quot;new.htm&quot; in the popup window:<br><br>&lt;html&gt;<br>&lt;head&gt;<br>&lt;title&gt;Untitled Document&lt;/title&gt;<br>&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8859-1&quot;&gt;<br>&lt;/head&gt;<br>&lt;body bgcolor=&quot;#FFFFFF&quot;&gt;<br>&lt;form name=form1 method=&quot;post&quot; action=&quot;&quot;&gt;<br>&lt;input type=&quot;text&quot; name=&quot;text1&quot; &gt;<br>&nbsp;&nbsp;&lt;input type=button name=submit value=&quot;Submit&quot; onClick=&quot;document.form1.submit.value='ok';&quot;&gt;<br>&lt;/form&gt;<br>&lt;/body&gt;<br>&lt;/html&gt;<br><br><br>