function create() {
	this.width = ''
	this.height = ''
	this.src = ''
	this.href = ''
	this.border = ''
	this.mouseover = ''
}


function random(n)  {
	var js_mult1=3141
	var js_mult2=5821
	var js_m1=100000000
	var js_m2=10000
	var js_iseed=0
	var js_iseed1=0
	var js_iseed2=0

	if (js_iseed == 0)  {
		now = new Date()
		js_iseed = now.getHours() + now.getMinutes() * 60 + now.getSeconds() * 3600
	}

	js_iseed1 = js_iseed / js_m2
	js_iseed2 = js_iseed % js_m2
	var tmp = (((js_iseed2 * js_mult1 + js_iseed1 * js_mult2) % js_m2) * js_m2 + (js_iseed2 *
js_mult2)) % js_m1
	js_iseed = (tmp + 1) % js_m1
	return (Math.floor((js_iseed/js_m1) * n))
}

var numberOfAds = 4     //number or ads you want to display

ads = new Array()
for(var i=1; i<=numberOfAds; i++) { ads[i] = new create() }

ads[1].width = "468"
ads[1].height = "60"
ads[1].src = "http://impes.tradedoubler.com/imp?type(img)g(16940892)a(505373)"
ads[1].href = "http://clk.tradedoubler.com/click?p=55272&a=505373&g=16940892"
ads[1].border = "0"
ads[1].mouseover = "Crear-Empresas.com"

ads[2].width = "468"
ads[2].height = "60"
ads[2].src = "http://impes.tradedoubler.com/imp?type(img)g(16915664)a(505373)"
ads[2].href = "http://clk.tradedoubler.com/click?p=60896&a=505373&g=16915664"
ads[2].border = "0"
ads[2].mouseover = "Crear-Empresas.com"

ads[3].width = "468"
ads[3].height = "60"
ads[3].src = "http://impes.tradedoubler.com/imp?type(img)g(18849682)a(505373)"
ads[3].href = "http://clk.tradedoubler.com/click?p=193447&a=505373&g=18849682"
ads[3].border = "0"
ads[3].mouseover = "Crear-Empresas.com"

var n = random(numberOfAds)
n = (n==0) ? n+1 : n
n = (n > numberOfAds) ? n-numberOfAds : n

var image = ads[n]
var ad = ""
ad += '<a href="' + image.href + '" \n'
ad += 'onMouseOver="self.status=\'' + image.mouseover + '\'\;return true" \n'
ad += 'onMouseOut="self.status=\'\'"> \n'
ad += '<img src="' + image.src + '" width=' + image.width
ad += '\n height=' + image.height + ' border=' + image.border
ad += '\n></a>'