NumberOfImagesToRotatel = 16;

FirstPartl = '<img src="random_l/l';
LastPartl = '.jpg" width="120" height="150">';

function printImagel1() {
var l = Math.ceil(Math.random() * NumberOfImagesToRotatel);
document.write(FirstPartl + l + LastPartl);
}
function printImagel2() {
var l = Math.ceil(Math.random() * NumberOfImagesToRotatel);
document.write(FirstPartl + l + LastPartl);
}