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javascript escape (unescape) pound sign - utf-8 encoding

In UTF-8 encoding, pound sign (£) is two bytes: 0xC2 0xA3. However, if you use javascript escape() function, the output is %A3.

In server side, if you use the HttpUtility.UrlDecode("%A3") to decode it,  the result will be three bytes sequence: ef bf bd, which display like  �.

In order to get the correct UTF-8  pound character (£), you need to use javascript encodeURIComponent('£') function. The output will be expected %C2%A3.

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