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[SOLVED] Drop down list to text field

cs1h

By cs1h
in Javascript Help

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cs1h Advanced Member

cs1h

Posted
Posted

Hi,

 

I found this script on line that populates the choses in three drop down boxes (you choose from the first one and it populates the second, then you choose from the second and it populates the third).

 

But I was wondering if there is a way to make it put a value into a hidden field (there would only be one value in the third choice) when you make the second choice instead of a drop down box.

 

The code is,

<HEAD>

<script type="text/javascript">


var arrItems1 = new Array();
var arrItemsGrp1 = new Array();

arrItems1[3] = "Truck";
arrItemsGrp1[3] = 1;
arrItems1[4] = "Train";
arrItemsGrp1[4] = 1;
arrItems1[5] = "Car";
arrItemsGrp1[5] = 1;

arrItems1[6] = "Boat";
arrItemsGrp1[6] = 2;
arrItems1[7] = "Submarine";
arrItemsGrp1[7] = 2;

arrItems1[0] = "Planes";
arrItemsGrp1[0] = 3;
arrItems1[1] = "Ultralight";
arrItemsGrp1[1] = 3;
arrItems1[2] = "Glider";
arrItemsGrp1[2] = 3;

var arrItems2 = new Array();
var arrItemsGrp2 = new Array();

arrItems2[21] = "747";
arrItemsGrp2[21] = 0


arrItems2[31] = "Kolb Flyer";
arrItemsGrp2[31] = 1


arrItems2[35] = "Schwietzer Glider";
arrItemsGrp2[35] = 2

arrItems2[99] = "Chevy Malibu";
arrItemsGrp2[99] = 5


arrItems2[101] = "F-150";
arrItemsGrp2[101] = 3


arrItems2[103] = "Freight Train";
arrItemsGrp2[103] = 4


arrItems2[105] = "Oil Tanker";
arrItemsGrp2[105] = 6


arrItems2[200] = "Los Angelas Class";
arrItemsGrp2[200] = 7


function selectChange(control, controlToPopulate, ItemArray, GroupArray) {
  var myEle ;
  var x ;
  // Empty the second drop down box of any choices
  for (var q=controlToPopulate.options.length;q>=0;q--) controlToPopulate.options[q]=null;
  if (control.name == "firstChoice") {
    // Empty the third drop down box of any choices
    for (var q=form.thirdChoice.options.length;q>=0;q--) form.thirdChoice.options[q] = null;
}
  // ADD Default Choice - in case there are no values
  myEle = document.createElement("option") ;
  myEle.value = 0 ;
  myEle.text = "[sELECT]" ;
  // controlToPopulate.add(myEle) ;
  controlToPopulate.appendChild(myEle)
  // Now loop through the array of individual items
  // Any containing the same child id are added to
  // the second dropdown box
  for ( x = 0 ; x < ItemArray.length  ; x++ ) {
    if ( GroupArray[x] == control.value ) {
      myEle = document.createElement("option") ;
      //myEle.value = x ;
      myEle.setAttribute('value',x);
      // myEle.text = ItemArray[x] ;
      var txt = document.createTextNode(ItemArray[x]);
      myEle.appendChild(txt)
      // controlToPopulate.add(myEle) ;
      controlToPopulate.appendChild(myEle)
    }
  }
}

function selectChange(control, controlToPopulate, ItemArray, GroupArray) {
  var myEle ;
  var x ;
  // Empty the second drop down box of any choices
  for (var q=controlToPopulate.options.length;q>=0;q--) controlToPopulate.options[q]=null;
  if (control.name == "firstChoice") {
    // Empty the third drop down box of any choices
    for (var q=form.thirdChoice.options.length;q>=0;q--) form.thirdChoice.options[q] = null;
  }
  // ADD Default Choice - in case there are no values
  myEle=document.createElement("option");
  theText=document.createTextNode("[sELECT]");
  myEle.appendChild(theText);
  myEle.setAttribute("value","0");
  controlToPopulate.appendChild(myEle);
  // Now loop through the array of individual items
  // Any containing the same child id are added to
  // the second dropdown box
  for ( x = 0 ; x < ItemArray.length  ; x++ ) {
    if ( GroupArray[x] == control.value ) {
      myEle = document.createElement("option") ;
      //myEle.value = x ;
      myEle.setAttribute("value",x);
      // myEle.text = ItemArray[x] ;
      var txt = document.createTextNode(ItemArray[x]);
      myEle.appendChild(txt)
      // controlToPopulate.add(myEle) ;
      controlToPopulate.appendChild(myEle)
    }
  }
}
// -->
</script>
</HEAD>

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->

<BODY>

<form name=form>
<table align="center">
  <tr>
    <td>
      <select id="firstChoice" name="firstChoice" onchange="selectChange(this, form.secondChoice, arrItems1, arrItemsGrp1);">
        <option value="0" selected>[sELECT]</option>
        <option value="1">Land</option>
        <option value="2">Sea</option>
        <option value="3">Air</option>
      </select>
    </td><td>
      <select id="secondChoice" name="secondChoice" onchange="selectChange(this, form.thirdChoice, arrItems2, arrItemsGrp2);">
      </select>
      <select id="thirdChoice" name="thirdChoice">
      </select>
    </td>
  </tr>
</table>
</form>

<p><center>
</center><p>

 

All help is much appreciated,

Cs1h

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webster08 Newbie

webster08

Posted
Posted

here is a quick fix; not exactly a pro move - lol (i am feeling kind of slack tonite anyway :D); but it will work.

 

<HEAD>

<script type="text/javascript">

var arrItems1 = new Array();
var arrItemsGrp1 = new Array();

arrItems1[3] = "Truck";
arrItemsGrp1[3] = 1;
arrItems1[4] = "Train";
arrItemsGrp1[4] = 1;
arrItems1[5] = "Car";
arrItemsGrp1[5] = 1;

arrItems1[6] = "Boat";
arrItemsGrp1[6] = 2;
arrItems1[7] = "Submarine";
arrItemsGrp1[7] = 2;

arrItems1[0] = "Planes";
arrItemsGrp1[0] = 3;
arrItems1[1] = "Ultralight";
arrItemsGrp1[1] = 3;
arrItems1[2] = "Glider";
arrItemsGrp1[2] = 3;

var arrItems2 = new Array();
var arrItemsGrp2 = new Array();

arrItems2[21] = "747";
arrItemsGrp2[21] = 0


arrItems2[31] = "Kolb Flyer";
arrItemsGrp2[31] = 1


arrItems2[35] = "Schwietzer Glider";
arrItemsGrp2[35] = 2

arrItems2[99] = "Chevy Malibu";
arrItemsGrp2[99] = 5


arrItems2[101] = "F-150";
arrItemsGrp2[101] = 3


arrItems2[103] = "Freight Train";
arrItemsGrp2[103] = 4


arrItems2[105] = "Oil Tanker";
arrItemsGrp2[105] = 6


arrItems2[200] = "Los Angelas Class";
arrItemsGrp2[200] = 7


function selectChange(control, controlToPopulate, ItemArray, GroupArray) {
  var myEle ;
  var x ;
  // Empty the second drop down box of any choices
  for (var q=controlToPopulate.options.length;q>=0;q--) controlToPopulate.options[q]=null;
  if (control.name == "firstChoice") {
    // Empty the third drop down box of any choices
    for (var q=form.thirdChoice.options.length;q>=0;q--) form.thirdChoice.options[q] = null;
}
  // ADD Default Choice - in case there are no values
  myEle = document.createElement("option") ;
  myEle.value = 0 ;
  myEle.text = "[sELECT]" ;
  // controlToPopulate.add(myEle) ;
  controlToPopulate.appendChild(myEle)
  // Now loop through the array of individual items
  // Any containing the same child id are added to
  // the second dropdown box
  for ( x = 0 ; x < ItemArray.length  ; x++ ) {
    if ( GroupArray[x] == control.value ) {
      myEle = document.createElement("option") ;
      //myEle.value = x ;
      myEle.setAttribute('value',x);
      // myEle.text = ItemArray[x] ;
      var txt = document.createTextNode(ItemArray[x]);
      myEle.appendChild(txt)
      // controlToPopulate.add(myEle) ;
      controlToPopulate.appendChild(myEle)
    }
  }
}

function selectChange(control, controlToPopulate, ItemArray, GroupArray) {
  var myEle ;
  var x ;
  // Empty the second drop down box of any choices
  for (var q=controlToPopulate.options.length;q>=0;q--) controlToPopulate.options[q]=null;
  if (control.name == "firstChoice") {
    // Empty the third drop down box of any choices
    for (var q=form.thirdChoice.options.length;q>=0;q--) form.thirdChoice.options[q] = null;
  }
  // ADD Default Choice - in case there are no values
  myEle=document.createElement("option");
  theText=document.createTextNode("[sELECT]");
  myEle.appendChild(theText);
  myEle.setAttribute("value","0");
  controlToPopulate.appendChild(myEle);
  // Now loop through the array of individual items
  // Any containing the same child id are added to
  // the second dropdown box
  for ( x = 0 ; x < ItemArray.length  ; x++ ) {
    if ( GroupArray[x] == control.value ) {
      myEle = document.createElement("option") ;
      //myEle.value = x ;
      myEle.setAttribute("value",x);
      // myEle.text = ItemArray[x] ;
      var txt = document.createTextNode(ItemArray[x]);
      myEle.appendChild(txt)
      // controlToPopulate.add(myEle) ;
      controlToPopulate.appendChild(myEle)
    }
  }
}

function reroute()
{
var choice3 = document.getElementById("thirdChoice").getElementsByTagName("option")[1].innerHTML;
document.getElementById("alternatechoice").value = choice3;
}

</script>
</HEAD>

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->

<BODY>

<form name=form>
<table align="center">
  <tr>
    <td>
      <select id="firstChoice" name="firstChoice" onchange="selectChange(this, form.secondChoice, arrItems1, arrItemsGrp1);">
        <option value="0" selected>[sELECT]</option>
        <option value="1">Land</option>
        <option value="2">Sea</option>
        <option value="3">Air</option>
      </select>
    </td><td>
      <select id="secondChoice" name="secondChoice" onchange="selectChange(this, form.thirdChoice, arrItems2, arrItemsGrp2);reroute()">
      </select>
      <select id="thirdChoice" name="thirdChoice" style="display:none">
      </select>
    </td>
  </tr>
</table>
<input type="hidden" id="alternatechoice"/>
</form>

<p><center>
</center><p>

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