var imagenumber = 18 ;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array
images[1] = "http://www.alscoffee.com/images/post1_27.jpg"
images[2] = "http://www.alscoffee.com/images/post10_27.jpg"
images[3] = "http://www.alscoffee.com/images/post11_27.jpg"
images[4] = "http://www.alscoffee.com/images/post12_27.jpg"
images[5] = "http://www.alscoffee.com/images/post13_27.jpg"
images[6] = "http://www.alscoffee.com/images/post14_27.jpg"
images[7] = "http://www.alscoffee.com/images/post15_27.jpg"
images[8] = "http://www.alscoffee.com/images/post2_27.jpg"
images[9] = "http://www.alscoffee.com/images/post4_27.jpg"
images[10] = "http://www.alscoffee.com/images/post5_27.jpg"
images[11] = "http://www.alscoffee.com/images/post6_27.jpg"
images[12] = "http://www.alscoffee.com/images/post8_27.jpg"
images[13] = "http://www.alscoffee.com/images/post9_27.jpg"
images[14] = "http://www.alscoffee.com/images/post19_27.jpg"
images[15] = "http://www.alscoffee.com/images/post20_27.jpg"
images[16] = "http://www.alscoffee.com/images/post16_27.jpg"


var image = images[rand1]