//this creates a new array called banners banners = new Array(); //this sets strings to the values in the array //the markup is like this: "Website url,Banner url,Site description,Banner Width,Banner Height" banners[0] = "http://n5md.com/discography/195/An-Idea-of-north--Learning-to-walk,http://n5md.com/ads/external/195-igloo.jpg,mark harris - an idea of north...,468,58"; banners[1] = "http://n5md.com/discography/191/Delirium-Portraits,http://n5md.com/ads/external/191-igloo.jpg,Tobias Lilja - Delirium Portraits,468,58"; banners[2] = "http://n5md.com/discography/192/To-Destroy-A-City,http://n5md.com/ads/external/192-igloo.jpg,To Destroy A City,468,58"; //this create a random number between 0 and the length of the array(2 in this case) rand = Math.floor(Math.random() * banners.length); //this splits the string in the array into the strings that were separated by commas and calls it b. b = banners[rand].split(","); //this creates variables for the new strings that were split from the banners array url = b[0]; img = b[1]; des = b[2]; wid = b[3]; hei = b[4]; //this is the html markup that will display the banner on your site document.write('

');