if (!Array.prototype.indexOf) {
	Array.prototype.indexOf = function (obj, fromIndex) {
		if (fromIndex == null) {
			fromIndex = 0;
		} else if (fromIndex < 0) {
			fromIndex = Math.max(0, this.length + fromIndex);
		}
		for (var i = fromIndex, j = this.length; i < j; i++) {
			if (this[i] === obj) {
				return i;
			}
		}
		return -1;
	};
}
//function to get random number up to m
function randomXToY(minVal, maxVal, floatVal) {
	var randVal = minVal + (Math.random() * (maxVal - minVal));
	return typeof floatVal == 'undefined' ? Math.round(randVal) : randVal.toFixed(floatVal);
}

var au = [];
for (var i = 0; i < 4; i++) {
	var r = randomXToY(1, 8);
	while (au.indexOf(r) > -1) {
		r = randomXToY(1, 8);
	}
	au.push(r);
	document.write('<img src="assets/slides/slide_0' + r + '.jpg" width="500" height="145" alt="Technology" \/><br \/>');
	document.write('<span class="caption">&nbsp;<\/span><br \/>');
}