var img1 = "pics/art_header_1.jpg"
var img2 = "pics/art_header_2.jpg"
var img3 = "pics/art_header_3.jpg"
var img4 = "pics/art_header_4.jpg"
var img5 = "pics/art_header_5.jpg"
var img6 = "pics/art_header_6.jpg"
var img7 = "pics/art_header_7.jpg"
var img8 = "pics/art_header_8.jpg"
var img9 = "pics/art_header_9.jpg"
var img10 = "pics/art_header_10.jpg"
var img11 = "pics/art_header_11.jpg"
var img12 = "pics/art_header_12.jpg"
var img13 = "pics/art_header_13.jpg"
var img14 = "pics/art_header_14.jpg"

var randomize = Math.round(Math.random()*14) 

if (randomize == 0){ newimg = img1 } 
if (randomize == 1){ newimg = img1 } 

else if (randomize == 2){ newimg = img2 }
else if (randomize == 3){ newimg = img3 }
else if (randomize == 4){ newimg = img4 }
else if (randomize == 5){ newimg = img5 }
else if (randomize == 6){ newimg = img6 }
else if (randomize == 7){ newimg = img7 }
else if (randomize == 8){ newimg = img8 }
else if (randomize == 9){ newimg = img9 }
else if (randomize == 10){ newimg = img10 }
else if (randomize == 11){ newimg = img11 }
else if (randomize == 12){ newimg = img12 }
else if (randomize == 13){ newimg = img13 }
else{ newimg = img14 }
document.write('<IMG SRC="'+newimg+'">')