Use the validateForm function to validate the form when the user clicks "submit".

function validateForm(event) { var form = document.getElementById("pageForm");

var userAge = form.userAge; userAge.style.backgroundColor = "LightGreen";

if (userAge.value < 0) { userAge.style.backgroundColor = "Orange"; event.preventDefault(); } }

/* Your solution goes here */

could you please help me to finish the javascript code?