var prev_p,prev_c;
function prodset(t,p) {

// Colour of product navigation button
   if (prev_p) {
      document.getElementById("prodnav_"+prev_p).style.color=prev_c;
   }
   prev_p=p;
   prev_c=document.getElementById("prodnav_"+p).style.color;
   document.getElementById("prodnav_"+p).style.color="#000";

// Image names
   var pics=new Array();
   for (var i=1;i<=3;i++) {
      var timg=new Image();
      timg.src="images/"+t+"/"+p+i+".jpg";
      pics[i]=timg;
   }

// Frame orientation 
   var f=document.getElementById("frame0");
   var orientation=prod[p].orient;
   f.className="frame0"+orientation[0];
   for (var i=1;i<=3;i++) {
      f=document.getElementById("frame"+i);
      f.style.visibility="visible";
      if (i > prod[p].nimgs) {
         f.style.visibility="hidden";
      }
      else {
         f.className="frame"+i+orientation[i-1];
      }
   }

// Frames images
   document.getElementById("frame0").src=pics[1].src;
   document.getElementById("frame1").src=pics[1].src;
   document.getElementById("frame2").src=pics[2].src;
   document.getElementById("frame3").src=pics[3].src;

// Frame title/alt
   var cp=p;
   cp=cp.substring(0,1).toUpperCase()+cp.substring(1);
   document.getElementById("frame0").title=cp;
   document.getElementById("frame0").alt=cp;
   document.getElementById("frame1").title=cp;
   document.getElementById("frame1").alt=cp;
   document.getElementById("frame2").title=cp;
   document.getElementById("frame2").alt=cp;
   document.getElementById("frame3").title=cp;
   document.getElementById("frame3").alt=cp;

// Product description
   document.getElementById("proddescrblock").innerHTML=prod[p].descr;
}