var nameph=1;
  var numimg=19;
  a=new Array();
  b=new Array();
  w=new Array();
  h=new Array();

  a[1]="Chattanooga";b[1]="chattanooga";w[1]="607";h[1]="394";
  a[2]="Chicago ZIPs by Population";b[2]="chicago";w[2]="411";h[2]="380"; 
  a[3]="Chicago Ring Study";b[3]="chicago_ring";w[3]="607";h[3]="394";
  a[4]="Colorado";b[4]="colorado";w[4]="432";h[4]="372";
  a[5]="Lake Tahoe";b[5]="lake_tahoe";w[5]="637";h[5]="394";
  a[6]="London";b[6]="london";w[6]="595";h[6]="394";
  a[7]="New Mexico";b[7]="new_mexico";w[7]="311";h[7]="385";
  a[8]="Palm Springs";b[8]="palm_springs";w[8]="531";h[8]="393";
  a[9]="Pittsburgh Drive Time";b[9]="pittsburghdt";w[9]="531";h[9]="393";
  a[10]="San Diego";b[10]="san_diego";w[10]="424";h[10]="380";
  a[11]="San Diego Territtory";b[11]="san_diego_ter";w[11]="599";h[11]="394";
  a[12]="South Central Population";b[12]="south_central";w[12]="333";h[12]="333";
  a[13]="Street Map of DFW Area";b[13]="dfwarea";w[13]="598";h[13]="394";
  a[14]="TX Counties by Population";b[14]="texas";w[14]="489";h[14]="394";
  a[15]="Topo";b[15]="topo";w[15]="546";h[15]="366";
  a[16]="Tucson";b[16]="tucson";w[16]="607";h[16]="394";
  a[17]="UK Shaded Relief";b[17]="uk";w[18]="595";h[17]="394";
  a[18]="USA Population";b[18]="usa";w[18]="445";h[18]="345";
  a[19]="Washington DC Photo";b[19]="dcphoto";w[19]="423";h[19]="394";

  function ChangeF() {
   nameph=nameph+1;
   if (nameph==numimg+1) nameph=1;
   document.images["photo"].src="pict/" + b[nameph] + ".jpg";
   document.images["photo"].alt=a[nameph];
   document.all["sphoto"].innerHTML=a[nameph];
  }
  function ChangeB() {
   nameph=nameph-1;
   if (nameph==0) nameph=numimg;
   document.images["photo"].src="pict/" + b[nameph] + ".jpg";
   document.images["photo"].alt=a[nameph];
   document.all["sphoto"].innerHTML=a[nameph];
  }
  
  function linkSel(index){
	document.images["photo"].src="pict/" + b[index] + ".jpg";
	document.images["photo"].alt=a[index];
	nameph=index;
    document.all["sphoto"].innerHTML=a[index];
  }
  
  function Detail() {
   OpenWindow("fl/" + b[nameph]+".html",w[nameph],h[nameph]);
  }
  
  function OpenWindow(targetURL,w,h) {
   Window = open(targetURL,"","width="+w+",height="+h+",status=no,toolbar=no,location=no,resizable=yes,directories=no,scrollbars=no")
  }