JavaScript is able to write directly to the HTML when the page loads.
document.write("This was written to the screen with an inline javascript block.");
$(document).ready(function(){
$('#modifiedonload').html("This was written to the screen when the document
finished loading inside of an existing HTML element.");
});
If the number is less than or equal to 3, this div will be red. If the number is greater than 3, it will be green. The number is
var n = Math.random()*6; // gets a random floating point number between 0 and 6.
n = Math.floor(n) + 1; // rounds the number down then adds 1.
if(n <= 3){
$("#randomdiv").css("background-color", "red");
} else {
$("#randomdiv").css("background-color", "#090");
}
$("#randomdiv").append(n +".");