req-form.js

var DCData = { /* ... */ }
var TestData = { /* ... */ }

var PanelCodes = {
  "LABS, Inc": {
    "CT Panel": "3328", 
    "WU Panel": "3223"
  },
  "ViroMed Laboratories": {
    "CT Panel": "139467", 
    "WU Panel": "139468"
  }
}

function handleFormChange() {
  var dcName = this.getField("DC").value;
  var panelName = this.getField("Panel").value;

  var dcData = DCData[dcName];
  var labName = dcData.lab
  
  var testData = TestData[labName];
  
  // TODO: what should we do if there is no panel selected?
  // aka. `panelName == null`?
  var panelCode = PanelCodes[labName][panelName];

  setDcDataFormValues(dcData);
  setTestDataFormValues(testData, panelCode);
}

function setDcDataFormValues(dcData) {
  // Populate fields with values from the Department Data Object 
  this.getField("Account").value  = dcData.account; 
  this.getField("DCName").value   = dcData.dcname; 
  this.getField("Contact").value  = dcData.contact; 
  this.getField("Phone").value    = dcData.phone; 
  this.getField("Fax").value      = dcData.fax; 
  this.getField("Email").value    = dcData.email; 
  this.getField("Lab").value      = dcData.lab; 
  this.getField("Address1").value = dcData.address1;
  this.getField("Address2").value = dcData.address2;
  this.getField("Address3").value = dcData.address3;
  this.getField("HgBS").value     = dcData.hgbcode;  
}

function setTestDataFormValues(testData, panelCode) {
  // Populate fields with values from the Object 
  this.getField("test1").value     = testData.test1;  
  this.getField("test2").value     = testData.test2;  
  this.getField("test3").value     = testData.test3;  
  this.getField("test4").value     = testData.test4;  
  this.getField("test5").value     = testData.test5;  
  this.getField("test6").value     = testData.test6;  
  this.getField("test7").value     = testData.test7;  
  this.getField("test8").value     = testData.test8;  
  this.getField("test9").value     = testData.test9;  
  this.getField("test10").value    = testData.test10;  
  this.getField("test11").value    = testData.test11;  
  this.getField("PanelCode").value = panelcode;  
}


//</ACRO_script>
//</Document-Level>

//<AcroForm>
//<ACRO_source>DC:Keystroke</ACRO_source>
//<ACRO_script>
/*********** belongs to: AcroForm:DC:Keystroke ***********/
if( event.willCommit ) { 
    if(event.value == " ") {
      this.resetForm(["DCName","Account","DC","Contact","Phone","Fax","Email", "DrawDate", "DrawTime", "Lab","Address1","Address2","Address3" ]); 
    } else { 
      handleFormChange(); 
    }
}
//</ACRO_script>
//</AcroForm>

//<AcroForm>
//<ACRO_source>Panel:Keystroke</ACRO_source>
//<ACRO_script>
/*********** belongs to: AcroForm:Panel:Keystroke ***********/
if( event.willCommit ) { 
    if(event.value == " ") {
      this.resetForm(["Panel","test1","test2","test3","test4","test5","test6","test7","test8","test9","test10","test11","PanelCode" ]); 
    } else { 
      handleFormChange(); 
    }
}
//</ACRO_script>
//</AcroForm>