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JavaScript复制网页内容到剪切板 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
	<title></title>
		
</head>
<body>
<script language="javascript">  
function CopyIt(theField)  
{  
    var tempval=document.getElementById(theField)  
    tempval.focus()  
    tempval.select()  
    copyToClipboard(tempval.value);  
    //therange=tempval.createTextRange()  
    //therange.execCommand("Copy")  
    //window.clipboardData.setData("text",tempval.value);  
}  
  
function copyToClipboard(txt) {  
    if(window.clipboardData)   
    {  
        window.clipboardData.clearData();  
        window.clipboardData.setData("Text", txt);  
        alert("复制成功");  
    }   
    else if(navigator.userAgent.indexOf("Opera") != -1)   
    {  
        window.location = txt;  
    }   
    else if (window.netscape)   
    {  
        try {  
            netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
        } catch (e) {  
            alert("如果您正在使用FireFox！\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);  
        alert("复制成功！")  
    }  
}  
</script> 
<input type="text" id="content" value="小火柴.NET"/>
<input type="button" onclick="CopyIt('content')" value="复制"/>
</body>
</html>


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