var chosenImage=new Array();
chosenImage[0]="Spit-header1.jpg";
chosenImage[1]="Spit-header2.jpg";
chosenImage[2]="Spit-header3.jpg";
chosenImage[3]="Spit-header4.jpg";

var chosenAltCopy=new Array();
chosenAltCopy[0]="Welcome to Spit";
chosenAltCopy[1]="Welcome to Spit";
chosenAltCopy[2]="Welcome to Spit";
chosenAltCopy[3]="Welcome to Spit";

var getRan=Math.floor(Math.random()*chosenImage.length);

function randomImage()
{
document.getElementById('randomImage').setAttribute('src','Spit-random-headers/'+chosenImage[getRan]);
document.getElementById('randomImage').setAttribute('alt',chosenAltCopy[getRan]);
}