Convert RMB numbers to uppercase_javascript skills

Using the function of regular expressions, in addition to correctly converting the capital form of RMB, it can also determine whether the input form is correct and valid.

<title>Convert RMB numbers into uppercase form</title> <input id="Digits" type="text" name="Digits" size="20"> <input id="Convert" type="button" value="Convert" name="Convert" onclick="Result.value = convertCurrency(Digits.value);"> <input id="Result" type="text" name="Result" size="60">
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

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