function copyToClipboard(txt) {
	if(window.clipboardData) {
		window.clipboardData.clearData();
		window.clipboardData.setData('Text', txt);
	} else if(navigator.userAgent.indexOf('Opera') != -1) {
		window.location = txt;
	} else if (window.netscape) {
		try {
			netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead UniversalBrowserWrite");
			netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
		} catch (e) {
			alert("Você precisa setar a opção 'signed.applets.codebase_principal_support = true' no endereço 'about:config' em seu navegador.\n\nYou need set 'signed.applets.codebase_principal_support=true' at url 'about:config' in your browser.");
			return false;
		}

		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(),
			len = new Object(),
			str = Components.classes['@mozilla.org/supports-string;1'].createInstance(Components.interfaces.nsISupportsString),
			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);
	}
}