var theImages = new Array() 

theImages[0] = 'e107_themes/4xA_048/images/portugal1.jpg'
theImages[1] = 'e107_themes/4xA_048/images/portugal2.jpg'
theImages[2] = "e107_themes/4xA_048/images/portugal3.jpg"
theImages[3] = "e107_themes/4xA_048/images/portugal4.jpg"
theImages[4] = "e107_themes/4xA_048/images/portugal5.jpg"
theImages[5] = "e107_themes/4xA_048/images/portugal6.jpg"
theImages[6] = "e107_themes/4xA_048/images/portugal7.jpg"
theImages[7] = "e107_themes/4xA_048/images/portugal8.jpg"
theImages[8] = "e107_themes/4xA_048/images/portugal9.jpg"
theImages[9] = "e107_themes/4xA_048/images/portugal10.jpg"
theImages[10] = "e107_themes/4xA_048/images/portugal11.jpg"
theImages[11] = "e107_themes/4xA_048/images/portugal12.jpg"
theImages[12] = "e107_themes/4xA_048/images/portugal13.jpg"
theImages[13] = "e107_themes/4xA_048/images/portugal14.jpg"
theImages[14] = "e107_themes/4xA_048/images/portugal15.jpg"


var j = 0
var p = theImages.length;

var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}

var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'">');
}
showImage();