function SelectBld(){

  removeAllOptions(document.getElementById("slBuildingID"));
  addOption(document.getElementById("slBuildingID"), "", "Select building", "");

  switch(document.getElementById("streetID").value) {

  case '1':
    addOption(document.getElementById("slBuildingID"),"1157","Mike Test 1 - Chestnut Road North Side");
    addOption(document.getElementById("slBuildingID"),"1161","Building - High Street North Side");
    addOption(document.getElementById("slBuildingID"),"1158","Testing 123");
    break;

  case '2':
    break;

  case '3':
    break;

  case '8':
    break;

  case '9':
    addOption(document.getElementById("slBuildingID"),"1160","Mike Test 1 - Chestnut Road North Side");
    addOption(document.getElementById("slBuildingID"),"1159","Mike Test 1 - Chestnut Road North Side");
    break;

  case '19':
    break;

  case '12':
    addOption(document.getElementById("slBuildingID"),"1162","8 Mount Pleasant");
    addOption(document.getElementById("slBuildingID"),"1163","9 Mount Pleasant");
    addOption(document.getElementById("slBuildingID"),"1164","10 Mount Pleasant");
    addOption(document.getElementById("slBuildingID"),"1167","12 Mount Pleasant");
    addOption(document.getElementById("slBuildingID"),"1168","13 Mount Pleasant");
    addOption(document.getElementById("slBuildingID"),"1165","11 Mount Pleasant");
    break;

  case '13':
    break;

  case '14':
    break;

  case '6':
    break;

  case '7':
    break;

  case '4':
    break;

  case '5':
    break;

  case '10':
    break;

  case '11':
    break;

  case '15':
    break;

  case '21':
    addOption(document.getElementById("slBuildingID"),"1166","Big House On the Mall");
    break;
  }      // end of JS switch
}       // end of JS function SelectBld()

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);
}