var mEssage = new Array() 
mEssage[0] = '<img src="images/side/side3-1.jpg" alt="" />'
mEssage[1] = '<img src="images/side/side3-2.jpg" alt="" />'
mEssage[2] = '<img src="images/side/side3-3.jpg" alt="" />'
mEssage[3] = '<img src="images/side/side3-4.jpg" alt="" />'

var k = 0
var q = mEssage.length;

var preBuffer = new Array()
for (w = 0; w < q; w++){
   preBuffer[w] = new Image()
   preBuffer[w].src = mEssage[w]
}

var whichImage = Math.round(Math.random()*(q-1));
function randomSide(){
document.write(mEssage[whichImage]);
}