function SelectDist(){

 removeAllOptions(document.foSelect.districtID);
 removeAllOptions(document.foSelect.page);
//  addOption(document.foSelect.districtID, "", "Select district", "");  // added below

  switch(document.foSelect.year.value) {

  case '1841':
    addOption(document.foSelect.districtID,"1","All 1841");
    break;

  case '1851':
    addOption(document.foSelect.districtID,"2","All 1851");
    break;

  case '1861':
    addOption(document.foSelect.districtID,"3","All 1861");
    addOption(document.foSelect.districtID,"15","Extra 1861");
    break;

  case '1871':
    addOption(document.foSelect.districtID,"4","All 1871");
    break;

  case '1881':
    addOption(document.foSelect.districtID,"5","All 1881");
    break;

  case '1891':
    addOption(document.foSelect.districtID,"6","All 1891");
    break;

  case '1901':
    addOption(document.foSelect.districtID,"7","All 1901");
    break;

  case '1911':
    addOption(document.foSelect.districtID,"8","All 1911");
    addOption(document.foSelect.districtID,"9","Extra 1911");
    break;
  }      // end of JS switch
}       // end of JS function SelectDist()


function SelectPage(){

 removeAllOptions(document.foSelect.page);

 switch(document.foSelect.districtID.value) {

  case '16':
    break;

  case '8':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    addOption(document.foSelect.page,"25","25");
    addOption(document.foSelect.page,"26","26");
    addOption(document.foSelect.page,"27","27");
    addOption(document.foSelect.page,"28","28");
    addOption(document.foSelect.page,"29","29");
    addOption(document.foSelect.page,"30","30");
    addOption(document.foSelect.page,"31","31");
    addOption(document.foSelect.page,"33","33");
    addOption(document.foSelect.page,"34","34");
    addOption(document.foSelect.page,"35","35");
    addOption(document.foSelect.page,"36","36");
    addOption(document.foSelect.page,"37","37");
    addOption(document.foSelect.page,"38","38");
    addOption(document.foSelect.page,"39","39");
    addOption(document.foSelect.page,"40","40");
    addOption(document.foSelect.page,"41","41");
    addOption(document.foSelect.page,"42","42");
    addOption(document.foSelect.page,"43","43");
    addOption(document.foSelect.page,"44","44");
    addOption(document.foSelect.page,"45","45");
    addOption(document.foSelect.page,"46","46");
    addOption(document.foSelect.page,"47","47");
    addOption(document.foSelect.page,"48","48");
    addOption(document.foSelect.page,"49","49");
    addOption(document.foSelect.page,"50","50");
    addOption(document.foSelect.page,"51","51");
    addOption(document.foSelect.page,"52","52");
    addOption(document.foSelect.page,"53","53");
    addOption(document.foSelect.page,"54","54");
    addOption(document.foSelect.page,"55","55");
    addOption(document.foSelect.page,"56","56");
    addOption(document.foSelect.page,"57","57");
    addOption(document.foSelect.page,"58","58");
    addOption(document.foSelect.page,"59","59");
    addOption(document.foSelect.page,"61","61");
    addOption(document.foSelect.page,"62","62");
    addOption(document.foSelect.page,"63","63");
    addOption(document.foSelect.page,"64","64");
    addOption(document.foSelect.page,"65","65");
    addOption(document.foSelect.page,"66","66");
    addOption(document.foSelect.page,"67","67");
    addOption(document.foSelect.page,"68","68");
    addOption(document.foSelect.page,"69","69");
    addOption(document.foSelect.page,"70","70");
    addOption(document.foSelect.page,"72","72");
    addOption(document.foSelect.page,"73","73");
    addOption(document.foSelect.page,"74","74");
    addOption(document.foSelect.page,"75","75");
    addOption(document.foSelect.page,"76","76");
    addOption(document.foSelect.page,"77","77");
    addOption(document.foSelect.page,"78","78");
    addOption(document.foSelect.page,"79","79");
    addOption(document.foSelect.page,"80","80");
    addOption(document.foSelect.page,"81","81");
    addOption(document.foSelect.page,"82","82");
    addOption(document.foSelect.page,"83","83");
    addOption(document.foSelect.page,"84","84");
    addOption(document.foSelect.page,"85","85");
    addOption(document.foSelect.page,"86","86");
    addOption(document.foSelect.page,"87","87");
    addOption(document.foSelect.page,"88","88");
    addOption(document.foSelect.page,"89","89");
    addOption(document.foSelect.page,"90","90");
    addOption(document.foSelect.page,"91","91");
    addOption(document.foSelect.page,"92","92");
    addOption(document.foSelect.page,"93","93");
    addOption(document.foSelect.page,"94","94");
    addOption(document.foSelect.page,"95","95");
    addOption(document.foSelect.page,"96","96");
    addOption(document.foSelect.page,"97","97");
    addOption(document.foSelect.page,"98","98");
    addOption(document.foSelect.page,"99","99");
    addOption(document.foSelect.page,"100","100");
    addOption(document.foSelect.page,"101","101");
    addOption(document.foSelect.page,"102","102");
    addOption(document.foSelect.page,"103","103");
    addOption(document.foSelect.page,"104","104");
    addOption(document.foSelect.page,"105","105");
    addOption(document.foSelect.page,"106","106");
    addOption(document.foSelect.page,"107","107");
    addOption(document.foSelect.page,"108","108");
    addOption(document.foSelect.page,"109","109");
    addOption(document.foSelect.page,"110","110");
    addOption(document.foSelect.page,"111","111");
    addOption(document.foSelect.page,"112","112");
    addOption(document.foSelect.page,"113","113");
    addOption(document.foSelect.page,"114","114");
    addOption(document.foSelect.page,"115","115");
    addOption(document.foSelect.page,"116","116");
    addOption(document.foSelect.page,"117","117");
    break;

  case '7':
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    break;

  case '6':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    break;

  case '5':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    break;

  case '4':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    addOption(document.foSelect.page,"25","25");
    addOption(document.foSelect.page,"26","26");
    addOption(document.foSelect.page,"27","27");
    addOption(document.foSelect.page,"28","28");
    break;

  case '3':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    addOption(document.foSelect.page,"25","25");
    addOption(document.foSelect.page,"26","26");
    addOption(document.foSelect.page,"27","27");
    addOption(document.foSelect.page,"28","28");
    break;

  case '2':
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    addOption(document.foSelect.page,"25","25");
    addOption(document.foSelect.page,"26","26");
    addOption(document.foSelect.page,"27","27");
    addOption(document.foSelect.page,"28","28");
    addOption(document.foSelect.page,"29","29");
    addOption(document.foSelect.page,"30","30");
    addOption(document.foSelect.page,"31","31");
    addOption(document.foSelect.page,"32","32");
    addOption(document.foSelect.page,"33","33");
    addOption(document.foSelect.page,"34","34");
    addOption(document.foSelect.page,"35","35");
    addOption(document.foSelect.page,"36","36");
    break;

  case '1':
    addOption(document.foSelect.page,"1","1");
    addOption(document.foSelect.page,"2","2");
    addOption(document.foSelect.page,"3","3");
    addOption(document.foSelect.page,"4","4");
    addOption(document.foSelect.page,"5","5");
    addOption(document.foSelect.page,"6","6");
    addOption(document.foSelect.page,"7","7");
    addOption(document.foSelect.page,"8","8");
    addOption(document.foSelect.page,"9","9");
    addOption(document.foSelect.page,"10","10");
    addOption(document.foSelect.page,"11","11");
    addOption(document.foSelect.page,"12","12");
    addOption(document.foSelect.page,"13","13");
    addOption(document.foSelect.page,"14","14");
    addOption(document.foSelect.page,"15","15");
    addOption(document.foSelect.page,"16","16");
    addOption(document.foSelect.page,"17","17");
    addOption(document.foSelect.page,"18","18");
    addOption(document.foSelect.page,"19","19");
    addOption(document.foSelect.page,"20","20");
    addOption(document.foSelect.page,"21","21");
    addOption(document.foSelect.page,"22","22");
    addOption(document.foSelect.page,"23","23");
    addOption(document.foSelect.page,"24","24");
    addOption(document.foSelect.page,"25","25");
    addOption(document.foSelect.page,"26","26");
    addOption(document.foSelect.page,"27","27");
    addOption(document.foSelect.page,"28","28");
    addOption(document.foSelect.page,"29","29");
    break;

  case '9':
    break;

  case '15':
    break;
  }      // end of JS switch
}       // end of JS function SelectPage()


function removeAllOptions(selectbox)
{
	var i;
	for(i=selectbox.options.length-1;i>=0;i--)
	{
		//selectbox.options.remove(i);
		selectbox.remove(i);
	}
}


function addOption(selectbox, value, text )
{
	var optn = document.createElement("OPTION");
	optn.text = text;
	optn.value = value;

	selectbox.options.add(optn);
}