Question 3 Referring to Figure 2, write a JavaScript function onsubmit() to allow users to key in the values of Length and Width, then calculate the area of rectangle. Display back the input number from the user and area of rectangle using a message Box. Get the Area of the rectangle Input the length and width of the rectangle in metre and get the area of the rectangle. Length of the rectangle : Width of the rectangle : Calculate Area Siauro 2 Coloulator