在用swfobject.js来显示flash的时候, 好像当浏览器没有flash时. 不会提示安装.

firefox / IE

1.手动方式:(在没有flash时, 会显示出一个链接提供下载安装)

<div id="divNoFlash" style=" display:none " >
       <h4>
           This page need Adobe Flash Player。</h4>
       <p>
           <a href="http://www.adobe.com/go/getflashplayer">
               <img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif"
                   alt="Get Adobe Flash Player" width="112" height="33" /></a></p>
   </div>

<script>
       function CheckFlashInstall() {
           var PlayerVersion = [];
           if (navigator.plugins && navigator.mimeTypes.length) {
               var x = navigator.plugins["Shockwave Flash"];
               if (x && x.description) {
                   PlayerVersion = x.description.replace("/([a-zA-Z]|/s)+/", "").replace("/(/s+r|/s+b[0-9]+)/", ".").split(".");
               }
           } else if (navigator.userAgent && navigator.userAgent.indexOf("Windows CE") >= 0) { // if Windows CE
               var axo = 1;
               var counter = 3;
               while (axo) {
                   try {
                       counter++;
                       axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash." + counter);
                       PlayerVersion = [counter, 0, 0];
                   } catch (e) {
                       axo = null;
                   }
               }
           } else { /// Win IE (non mobile)
               /// do minor version lookup in IE, but avoid fp6 crashing issues
               try {
                   var axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");
               } catch (e) {
                   try {
                       var axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");
                       PlayerVersion = [6, 0, 21];
                       axo.AllowScriptAccess = "always";
                   } catch (e) {
                       if (PlayerVersion[0] == 6)
                           return PlayerVersion;
                   }
                   try {
                       axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
                   } catch (e) { }
               }
               if (axo != null) {
                   PlayerVersion = axo.GetVariable("$version").split(" ")[1].split(",");
               }
           }
           return PlayerVersion;
       }
       var ver = CheckFlashInstall();
       if (ver == "") {
           document.getElementById("divNoFlash").style.display = "";
           //document.write("不支持 flash");
       }
       else {
           document.getElementById("divNoFlash").style.display = "none";
           //document.write("支持 flash");
       }
   </script>

2.自动方式

Firefox会显示安装插件.

<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0"
        width="760" height="193">
        <param name="movie" value="Scripts/1.swf">
        <param name="quality" value="high">
        <embed src="Scripts/1.swf" quality="high" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"
            type="application/x-shockwave-flash" width="760" height="193" bgcolor="#D7EDAD">
    </embed>
    </object>