支持Firefox和IE的文本复制Javascript

1. function copyToClipboard(text){
2.     if(text==null||text=='undefined')
3.             return;
4.                 
5.             //window.clipboardData.setData("Text",text);
6.    if (window.clipboardData){
7.          window.clipboardData.setData("Text", text);
8.        }
9.    else if (window.netscape){
10.        netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
11.        var clip = Components.classes['@mozilla.org/widget/clipboard;1']
12.                      .createInstance(Components.interfaces.nsIClipboard);
13.        if (!clip) return;
14.        var trans = Components.classes['@mozilla.org/widget/transferable;1']
15.                       .createInstance(Components.interfaces.nsITransferable);
16.        if (!trans) return;
17.        trans.addDataFlavor('text/unicode');
18.        
19.        var str = new Object();
20.        var len = new Object();
21.        
22.        var str = Components.classes["@mozilla.org/supports-string;1"]
23.                     .createInstance(Components.interfaces.nsISupportsString);
24.        
25.        var copytext=text;
26.        
27.        str.data=copytext;
28.        
29.        trans.setTransferData("text/unicode",str,copytext.length*2);
30.        
31.        var clipid=Components.interfaces.nsIClipboard;
32.        
33.        if (!clip) return ;
34.        
35.        clip.setData(trans,null,clipid.kGlobalClipboard);
36.        
37.        }else{
38.           window.alert("不支持该浏览器的复制功能，请手动复制");
    
39.           return;
    
40.        }
    
41.         window.alert("已复制成功，请直接粘贴$codeFormat");
42.     }