IE和firefox通用的复制到剪贴板的JS函数

 this is a javascript that i built out of several sources so that it is possible to copy text out of HTML in firefox/mozilla/netscape and in Internet Explorer

 

1. function copyToClipboard(txt) {    
2.      if(window.clipboardData) {    
3.              window.clipboardData.clearData();    
4.              window.clipboardData.setData("Text", txt);    
5.      } else if(navigator.userAgent.indexOf("Opera") != -1) {    
6.           window.location = txt;    
7.      } else if (window.netscape) {    
8.           try {    
9.                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");    
10.           } catch (e) {    
11.                alert("被浏览器拒绝！/n请在浏览器地址栏输入'about:config'并回车/n然后将'signed.applets.codebase_principal_support'设置为'true'");    
12.           }    
13.           var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);    
14.           if (!clip)    
15.                return;    
16.           var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);    
17.           if (!trans)    
18.                return;    
19.           trans.addDataFlavor('text/unicode');    
20.           var str = new Object();    
21.           var len = new Object();    
22.           var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);    
23.           var copytext = txt;    
24.           str.data = copytext;    
25.           trans.setTransferData("text/unicode",str,copytext.length*2);    
26.           var clipid = Components.interfaces.nsIClipboard;    
27.           if (!clip)    
28.                return false;    
29.           clip.setData(trans,null,clipid.kGlobalClipboard);    
30.           alert("复制成功！")    
31.      }    
32. }