Random value/Image from Javascript Array

For load Random Images

var arrName = new Array(2);

  arrName[0] = "http://abc.com/1.png";

  arrName[1] = " http://abc.com/2.png";

for link on Images

var arrLink = new Array(2);

  arrLink[0] = "http://abc.com/xyz.aspx?id=1";

  arrLink[1] = " http://abc.com/xyz.aspx?id=2";

  var firstRandomNumber = (Math.round((Math.random()*14)+1))

Load Randon Image and Link.

  document.write("<a href="+arrLink[firstRandomNumber]   +"> "+"<img src= "  + arrName[firstRandomNumber]+">");