function sidePop(sideNo) {

var sideMsg = "";
showed=0;

switch(sideNo) {
  case 0 : sideMsg="Water butt index page"; break;
  case 1 : sideMsg="Large plastic water storage tanks"; break;
  case 2 : sideMsg="Rainwater pumping stations for feeding water from drainpipes to large storage vessels"; break;
  case 3 : sideMsg="Plastic water butts"; break;
  case 4 : sideMsg="Oak-barrel water butts"; break;
  case 5 : sideMsg="3P rain-tank rainwater storage systems"; break;
  case 6 : sideMsg="Underground rainwater storage tanks"; break;
  case 7 : sideMsg="Underground rainwater storage systems"; break;
  case 8 : sideMsg="Surface and underground potable water tanks suitable for storing drinking water"; break;
  case 9 : sideMsg="Collection & storage systems with surface tanks"; break;
  case 10: sideMsg="Systems for supplying piped rainwater for domestic appliance use."; break;
  default: sideMsg=""; break;
  }

showPop(sideMsg,'side');

}