function doIt() {
var newDiv = document.createElement("div");
function randomInteger(min, max) {
var rand = min - 0.5 + Math.random() * (max - min + 1)
rand = Math.round(rand);
return rand;
}
function randomColor(min, max) {
var rand = min - 0.5 + Math.random() * (max - min + 1)
rand = Math.round(rand);
return rand;
}
var x = randomInteger(100,1000);
var cr = randomColor(1,255);
var cg = randomColor(1,255);
var cb = randomColor(1,255);
newDiv.style.height = x + "px";
newDiv.style.width = "50%";
newDiv.style.background = 'rgb('+ cr +','+ cg +', ' + cb + ')';
newDiv.style.marginBottom = "30px";
newDiv.style.left = "100px";
document.body.appendChild(newDiv);
}