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write javascript in html as simple way
Ex-4 Write a JavaScript program to create an online clock. It will display a button with text “Let It Show”. When user clicks on the button, it will display the current local time with the format hh:mm:ss:ms, where hh is two digit represent the current hour. 00 means midnight. If the value is less than 10 then add a 'O' in front of the hour value. Similar to treat minutes, seconds and milliseconds. The clock display on the screen will continuously update itself every 100 milliseconds. You can use setTimeout function (or use other JavaScript function that you find useful) to do this. The diagrams show some of the screen shots after user clicked the button. Once again, after user click 'Let It Show' (you don't have to click the button again), your clock will keep on clicking every 100 milliseconds and the clock will continuously update its time and display the time on the screen. The following shows the button when your program starts. Let It Show After user clicked the button. The time will show up and continue to update its display. Below showed three screen shots at different times. Let It Show 22:49:47:39 Let It Show 22:50:55:33 Let It Show 22:51:50:99