复制到剪切板

/** 复制内容到剪切板 */
function copyToClipboard(txt) {
if (window.clipboardData) {
window.clipboardData.clearData();// 清空剪切板
window.clipboardData.setData("Text", txt);// 复制数据到剪切板，这个“Text”属性是固定的
} else if (navigator.userAgent.indexOf("Opera") != -1) {
window.location = txt;// 这个应该是火狐的复制到剪切板的方法
} else if (window.netscape) {
try {
netscape.security.PrivilegeManager
.enablePrivilege("UniversalXPConnect");
} catch (e) {
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'");
}
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 = new Object();
var len = new Object();
var str = Components.classes["@mozilla.org/supports-string;1"]
.createInstance(Components.interfaces.nsISupportsString);
var copytext = txt;
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);
}
}