点击按钮实现文本的复制
<html><head><SCRIPT LANGUAGE="JavaScript">function copyToClipBoard(id){ var clipBoardContent = document.getElementById(id).value; if(window.clipboardData){ window.clipboardData.clearData(); window.clipboardData.setData("Text", clipBoardContent); }else if (window.netscape){ try{ netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); }catch (e){ alert("您的当前浏览器设置已关闭此功能！请按以下步骤开启此功能！\n新开一个浏览器，在浏览器地址栏输入'about:config'并回车。\n然后找到'signed.applets.codebase_principal_support'项，双击后设置为'true'。\n声明：本功能不会危极您计算机或数据的安全！"); } var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard); if (!clip) return; var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable); if (!trans) return; trans.addDataFlavor('text/unicode'); var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString); var copytext = clipBoardContent; str.data = copytext; trans.setTransferData("text/unicode",str,copytext.length*2); var clipid = Components.interfaces.nsIClipboard; if (!clip) return false; clip.setData(trans,null,clipid.kGlobalClipboard); } alert("已成功复制！"); return true;}</SCRIPT></head><body><input type="text"id="code"value='www.baidu.com' size="20" /><input type="button" value="复制"/><br/></body></html>
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