Convert in Uppercae and Lowercase using JavaScript

you can use builtIn javascript .toUpper() and .toLower() functions to convert string into upper or lower case.

var test="This is Test";

var test=test.toUpperCase();   

OutPut:

THIS IS TEST.


var test="This is Test";

var test=test.toLowerCase();   

OutPut:

this is test.

This is very simple and easy.