random_number= Math.floor(Math.random()* 4+1 );
// Loads the appropriate image and text color based on random number.
if (random_number==1) {
image="images/BGs/BG1.jpg";
}
if (random_number==2) {
image="images/BGs/BG2.jpg";
}
if (random_number==3) {
image="images/BGs/BG3.jpg";
}
if (random_number==4) {
image="images/BGs/BG4.jpg";
}