var theImages = new Array() 



theImages[1] = {src: 'images/banner-santa.gif', alt: 'All aboard Santas Train for a magical trip to Santas Christmas Kingdom', url: 'santatrains.html'}; // Add whatever properties you want here in "key: 'value'" form.
theImages[2] = {src: 'images/banner-cobwebs.gif', alt: 'Why not join us after the Christmas holidays to enjoy the fresh air and revive yourself for the New Year!', url: 'cobwebs.html'}; // Add whatever properties you want here in "key: 'value'" form.



var p = theImages.length;



var preBuffer = new Array();

for (i = 0; i < p; i++){

   preBuffer[i] = new Image();

   preBuffer[i].src = theImages[i];

}



function showImage(){

	var rand = Math.round(Math.random()*(p-1));

	var chosenImage = theImages[rand];



	document.write('<a href="'+ chosenImage.url +'"><img src="'+ chosenImage.src +'" alt="' + chosenImage.alt + '"></a>'); // Use properties here

}