function buildSelect(x) {
  if (x == "12") { 
    /* set choices 1 and 2 */
    option0 = new Option("UK shoe sizes",'You forgot to select a size - delete this')
    option1 = new Option("5",'UK size 5')
    option2 = new Option("5 1/2",'UK size 5 1/2')
    option3 = new Option("6",'UK size 6')
    option4 = new Option("6 1/2",'UK size 6 1/2')
    option5 = new Option("7",'UK size 7')
    option6 = new Option("7 1/2",'UK size 7 1/2')
    option7 = new Option("8",'UK size 8')
    option8 = new Option("8 1/2",'UK size 8 1/2')
    option9 = new Option("9",'UK size 9')
    option10 = new Option("9 1/2",'UK size 9 1/2')
    option11 = new Option("10",'UK size 10')
    option12 = new Option("10 1/2",'UK size 10 1/2')
    option13 = new Option("11",'UK size 11')
    option14 = new Option("11 1/2",'UK size 11 1/2')
    option15 = new Option("12",'UK size 12')
    option16 = new Option("12 1/2",'UK size 12 1/2')
    // write them
    document.getElementById("fieldB").options[0] = option0
    document.getElementById("fieldB").options[1] = option1
    document.getElementById("fieldB").options[2] = option2
    document.getElementById("fieldB").options[3] = option3
    document.getElementById("fieldB").options[4] = option4
    document.getElementById("fieldB").options[5] = option5
    document.getElementById("fieldB").options[6] = option6
    document.getElementById("fieldB").options[7] = option7
    document.getElementById("fieldB").options[8] = option8
    document.getElementById("fieldB").options[9] = option9
    document.getElementById("fieldB").options[10] = option10
    document.getElementById("fieldB").options[11] = option11
   	document.getElementById("fieldB").options[12] = option12
  	document.getElementById("fieldB").options[13] = option13
  	document.getElementById("fieldB").options[14] = option14
  	document.getElementById("fieldB").options[15] = option15
	document.getElementById("fieldB").options[16] = option16
                  
    return;
    }

  if (x == "34") { 
    /* set choices 3 and 4 */ 
    option0 = new Option("European shoe sizes",'You forgot to select a size - delete this')
    option1 = new Option("34",'Euro size 34')
    option2 = new Option("35",'Euro size 35')
    option3 = new Option("36",'Euro size 36')
    option4 = new Option("37",'Euro size 37')
    option5 = new Option("38",'Euro size 38')
    option6 = new Option("39",'Euro size 39')
  	option7 = new Option("40",'Euro size 40')
    option8 = new Option("41",'Euro size 41')
    option9 = new Option("42",'Euro size 42')
    option10 = new Option("43",'Euro size 43')
    option11 = new Option("44",'Euro size 44')
    option12 = new Option("45",'Euro size 45')
    option13 = new Option("46",'Euro size 46')
    // write them
    document.getElementById("fieldB").options[0] = option0
    document.getElementById("fieldB").options[1] = option1
    document.getElementById("fieldB").options[2] = option2
    document.getElementById("fieldB").options[3] = option3
    document.getElementById("fieldB").options[4] = option4
    document.getElementById("fieldB").options[5] = option5
    document.getElementById("fieldB").options[6] = option6
    document.getElementById("fieldB").options[7] = option7
    document.getElementById("fieldB").options[8] = option8
    document.getElementById("fieldB").options[9] = option9
    document.getElementById("fieldB").options[10] = option10
    document.getElementById("fieldB").options[11] = option11
    document.getElementById("fieldB").options[12] = option12
    document.getElementById("fieldB").options[13] = option13
    return;
    }

  if (x == "1234") { 
    /* set choices 1,2, 3, and 4 */ 
    option0 = new Option("USA female shoe sizes",'You forgot to select a size - delete this')
    option1 = new Option("US size 5",5)
    option2 = new Option("5 1/2",'US size 5 1/2')
    option3 = new Option("6",'US size 6')
    option4 = new Option("6 1/2",'US size 6 1/2')
    option5 = new Option("7",'US size 7')
    option6 = new Option("7 1/2",'US size 7 1/2')
    option7 = new Option("8",'US size 8')
    option8 = new Option("8 1/2",'US size 8 1/2')
    option9 = new Option("9",'US size 9')
    option10 = new Option("9 1/2",'US size 9 1/2')
    option11 = new Option("10",'US size 10')
    option12 = new Option("10 1/2",'US size 10 1/2')
    option13 = new Option("11",'US size 11')
    option14 = new Option("11 1/2",'US size 11 1/2')
    option15 = new Option("12",'US size 12')
    option16 = new Option("12 1/2",'US size 12 1/2')
    option17 = new Option("13",'US size 13')
    option18 = new Option("13 1/2",'US size 13 1/2')
    // write them
    document.getElementById("fieldB").options[0] = option0
    document.getElementById("fieldB").options[1] = option1
    document.getElementById("fieldB").options[2] = option2
    document.getElementById("fieldB").options[3] = option3
    document.getElementById("fieldB").options[4] = option4
    document.getElementById("fieldB").options[5] = option5
    document.getElementById("fieldB").options[6] = option6
    document.getElementById("fieldB").options[7] = option7
    document.getElementById("fieldB").options[8] = option8
    document.getElementById("fieldB").options[9] = option9
    document.getElementById("fieldB").options[10] = option10
    document.getElementById("fieldB").options[11] = option11
   	document.getElementById("fieldB").options[12] = option12
  	document.getElementById("fieldB").options[13] = option13
  	document.getElementById("fieldB").options[14] = option14
  	document.getElementById("fieldB").options[15] = option15
	document.getElementById("fieldB").options[16] = option16
	document.getElementById("fieldB").options[17] = option17
	document.getElementById("fieldB").options[18] = option18
    return;
    }

  if (x == "00") { 
    /* set choices to none */ 
    option0 = new Option("USA male shoe sizes",'You forgot to select a size - delete this')
    option1 = new Option("3 1/2",'US size 3 1/2')
    option2 = new Option("4",'US size 4')
    option3 = new Option("4 1/2",'US size 4 1/2')
    option4 = new Option("5",'US size 5')
	option5 = new Option("5 1/2",'US size 5 1/2')
    option6 = new Option("6",'US size 6')
    option7 = new Option("6 1/2",'US size 6 1/2')
    option8 = new Option("7",'US size 7')
    option9 = new Option("7 1/2",'US size 7 1/2')
    option10 = new Option("8",'US size 8')
    option11 = new Option("8 1/2",'US size 8 1/2')
    option12 = new Option("9",'US size 9')
    option13 = new Option("9 1/2",'US size 9 1/2')
    option14 = new Option("10",'US size 10')
    option15 = new Option("10 1/2",'US size 10 1/2')
    option16 = new Option("11",'US size 11')
    option17 = new Option("11 1/2",'US size 11 1/2')
    option18 = new Option("12",'US size 12')
    option19 = new Option("12 1/2",'US size 12 1/2')
    option20 = new Option("13",'US size 13')
    // write them
    document.getElementById("fieldB").options[0] = option0
    document.getElementById("fieldB").options[1] = option1
    document.getElementById("fieldB").options[2] = option2
    document.getElementById("fieldB").options[3] = option3
    document.getElementById("fieldB").options[4] = option4
    document.getElementById("fieldB").options[5] = option5
    document.getElementById("fieldB").options[6] = option6
    document.getElementById("fieldB").options[7] = option7
    document.getElementById("fieldB").options[8] = option8
    document.getElementById("fieldB").options[9] = option9
    document.getElementById("fieldB").options[10] = option10
    document.getElementById("fieldB").options[11] = option11
   	document.getElementById("fieldB").options[12] = option12
  	document.getElementById("fieldB").options[13] = option13
  	document.getElementById("fieldB").options[14] = option14
  	document.getElementById("fieldB").options[15] = option15
	document.getElementById("fieldB").options[16] = option16
	document.getElementById("fieldB").options[17] = option17
	document.getElementById("fieldB").options[18] = option18
	document.getElementById("fieldB").options[19] = option17
	document.getElementById("fieldB").options[20] = option18
    return;
    } 
}