function get_num(pick) {
 // pick = number of skyscrapers to choose from
 var num = Math.floor( Math.random() * pick );
	return num;
}
function build_skyscrapers() {

 // zero based matrix, i.e. number of skyscrapers -1 by number of params (link:0 and graphic link:1) -1
	var sky_array = new Array("http://www.AFPonline.org/img/AFPLS-T_Skyscraper_1.gif");
	var link_array = new Array("http://afponline.org/lst");
	var sky_output;
 var rndm_num = get_num( sky_array.length);
 var holder;

 sky_output ="<a href='" + link_array[rndm_num] + "'><img src='" + sky_array[rndm_num] + "' border=0></a>";

 return sky_output;
}