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javascript copy text to clipborad

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  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("被瀏覽器拒絕！\n請在瀏覽器地址欄輸入'about:config'並回車\n然後將'signed.applets.codebase_principal_support'設置為'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.      }
  31.      alert('已經複製');
  32. }
  33. </script>

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