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Hello, I'm currently working on a school project involving a bunch of coding in html, css and js. The project's purpose is to basically build a website containing a 'quiz' system. I've already managed to successfully create one, but I'm not yet fully satisfied with it. The quiz contains 21 questions in total, and each question has their own html page; 21 pages in total. Now I have been using a java code to call a random page when a button is pressed on the home website (index.html). It works properly, but it often redirects me to the same page every time I click the button. I want to prevent it from visiting the same page whenever the button is pressed, until all 21 pages have been visited, at which point it resets the data and starts over. I have been looking for a kind of script for this, but can't seem to find it. My only option would be to ask for help, which is why I'm here. This is the code I am currently using for the page randomizer: var howMany = 20; // max number of items listed below var page = new Array(howMany+1); page[0]="spelopdracht1.html"; page[1]="spelopdracht2.html"; page[2]="spelopdracht3.html"; page[3]="spelopdracht4.html"; page[4]="spelopdracht5.html"; page[5]="spelopdracht6.html"; page[6]="spelopdracht7.html"; page[7]="spelopdracht8.html"; page[8]="spelopdracht9.html"; page[9]="spelopdracht10.html"; page[10]="spelopdracht11.html"; page[11]="spelopdracht12.html"; page[12]="spelopdracht13.html"; page[13]="spelopdracht14.html"; page[14]="spelopdracht15.html"; page[15]="spelopdracht16.html"; page[16]="spelopdracht17.html"; page[17]="spelopdracht18.html"; page[18]="spelopdracht19.html"; page[19]="spelopdracht20.html"; page[20]="spelopdracht21.html"; function rndnumber(){ var randscript = -1; while (randscript < 0 || randscript > howMany || isNaN(randscript)){ randscript = parseInt(Math.random()*(howMany+1)); } return randscript; } quo = rndnumber(); quox = page[quo]; window.location=(quox); } } If there is anything you can do, please let me know. I would really appreciate your help! ^.^