复制到剪贴板方法

 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("您使用的浏览器不支持此复制功能，请使用ctrl+c或者浏览器右键复制");
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    }
31    return true;
32 }