从DHTML应用再次唤起一种思维：Flag

<a href="#" onclick="this.innerHTML='我是第2个'">我是第1个</a>

<a href="#" onclick="this.innerText='我是第2个'">我是第1个</a>

<script>
a=true
</script>
<a href="#" onclick="if(a){this.innerHTML='我是第2个';a=false};else{this.innerHTML='我是第1个';a=true}">我是第1个</a>

<object classid="clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6" id="cnbruce" width="245" height="240">
 <param name="URL" value="http://www.yaoni.com.cn/music/aiqingnuomandi.wma">
 <param name="rate" value="1">
 <param name="balance" value="0">
 <param name="currentPosition" value="0">
 <param name="defaultFrame" value>
 <param name="playCount" value="1">
 <param name="autoStart" value="-1">
 <param name="currentMarker" value="0">
 <param name="invokeURLs" value="-1">
 <param name="baseURL" value>
 <param name="volume" value="50">
 <param name="mute" value="0">
 <param name="uiMode" value="full">
 <param name="stretchToFit" value="0">
 <param name="windowlessVideo" value="0">
 <param name="enabled" value="-1">
 <param name="enableContextMenu" value="-1">
 <param name="fullScreen" value="0">
 <param name="SAMIStyle" value>
 <param name="SAMILang" value>
 <param name="SAMIFilename" value>
 <param name="captioningID" value>
 <param name="enableErrorDialogs" value="0">
 <param name="_cx" value="6482">
 <param name="_cy" value="6350">
</object>
</p>

<script>
a=true
</script>
<a href="###" onclick="if(a){this.innerHTML='4';a=false;parent.cnbruce.controls.pause()};else{this.innerHTML=';';a=true;parent.cnbruce.controls.play()}" style="font-size:12px; color:#000000;font-family:Webdings">;</a>