var imageArray = [ '' , '' ];
function rand( min, max ) {
var argc = arguments.length;
if (argc == 0) {
min = 0;
max = 1;
} else if (argc == 1) {
throw new Error('Warning: rand() expects exactly 2 parameters, 1 given');
}
return Math.floor(Math.random() * (max - min + 1)) + min;
}
document.getElementById('rightColsmall').innerHTML = imageArray[rand(0,1)];