求教两种文字编码的转换解决思路

求教两种文字编码的转换
如何把这段编码：

<table width="100">
<tr>
<td>我爱你</td>
</tr>
</table>

转化成为：
<table width="100">\n <tr>\n <td>我爱你</td>\n </tr>\n</table>

这两个编码应该如何转换，最好能给我个 javascript

------解决方案--------------------

JScript code

<script>
    var code = '<table width="100"><tr><td>我爱你</td></tr></table>'.replace(/(\<)/g, " &lt; ");
    code = code.replace(/(\>)/g, "&gt; ");
    code = code.replace(/(\")/g, "&quot; ");
    alert(code);
</script>

------解决方案--------------------

JScript code

function ToHtmlEnCode(str)  
{
var s = "";
if (str.length == 0) return "";
s = str.replace(/&/g, "&amp;");
s = s.replace(/</g, "&lt;");
s = s.replace(/>/g, "&gt;");
s = s.replace(/ /g, "&nbsp;");
s = s.replace(/\'/g, "'");
s = s.replace(/\"/g, "&quot;");
s = s.replace(/\n/g, "<br>");
return s;
}

 function ToHTMLDeCode(str)  
{
var s = "";
if (str.length == 0) return "";
s = str.replace(/&amp;/g, "&");
s = s.replace(/&lt;/g, "<");
s = s.replace(/&gt;/g, ">");
s = s.replace(/&nbsp;/g, " ");
s = s.replace(/'/g, "\'");
s = s.replace(/&quot;/g, "\"");
s = s.replace(/<br>/g, "\n");
return s;
}

var html = '<table width="100">&<tr><td>我爱你</td></tr></table>'
html = ToHtmlEnCode(html)
alert(html)
html = ToHTMLDeCode(html)
alert(html)

求教两种文字编码的转换解决思路

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