window.onload = function() { var time = new Date(); var seed = parseInt(time.getMilliseconds()); var multiplier = 1664525; //22865426; //1664525; //19754824; //623445118; var incre = 1013904223; //353567277898; var mod = Math.pow(2,32); //using the lcg formula function randSeed() { seed = (multiplier * seed + incre) % mod; return seed; } // function similar to Math.random() function randWhole() { var r = randSeed()/mod; return r; } // main random function function rand(n1,n2) { var r = randSeed()/mod; var r2 = Math.floor(r * (n2-n1-1)) + n1+1; return r2; } //outputs var o = document.getElementById("out"); o.innerHTML += "
rand(2,10)
"; for(var i=0; i<50; i++) { o.innerHTML += rand(2,10) + ", "; } o.innerHTML += "

rand(0,100)
"; for(var i=0; i<50; i++) { o.innerHTML += rand(0,100) + ", "; } o.innerHTML += "

rand(1,1000)
"; for(var i=0; i<50; i++) { o.innerHTML += rand(1,1000) + ", "; } // canvas visual period test var canv = document.getElementById("canv"); var c = canv.getContext("2d"); var y = 0; function draw() { for(var x=0; x<300; x++) { var z = randWhole(); if( z > 0.8) { c.fillStyle = "red"; } else if( z > 0.6) { c.fillStyle = "blue"; } else if(z >0.4) { c.fillStyle = "yellow"; } else if(z >0.2) { c.fillStyle = "green"; } else { c.fillStyle = "black"; } c.fillRect(x,y,1,1); } y++; if(y > 300) { clearInterval(setInt); } } var setInt = setInterval(draw,10) }

Random Number Generator Function