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How to make upper case of characters with Javascript?

Here is an example on how to set an input text box to upcase every first letter of everyword that is typed

The Code:

		function TC_UpCaseFirstLetters(InputBox){
			var RetValue = "";
			var InputStr = InputBox.value;
			var InputLen = InputStr.length;
			if( InputLen < 1)
				return;
			if( InputLen == 1 )
				RetValue = InputStr.toUpperCase();
			else{
				SecondLast = InputStr.substring( InputLen - 2, InputLen - 1 );
				LastChar   = InputStr.substring( InputLen - 1, InputLen);
				if(SecondLast == " ")
					RetValue = InputStr.substring(0,InputLen - 1) + LastChar.toUpperCase();
				else
					RetValue = InputStr;
			}
			if(InputBox.value != RetValue)
				InputBox.value = RetValue;
		}

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javascript || Upper case first letters

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