function setOptions(chosen) {
var selbox = document.myform.opttwo;

selbox.options.length = 0;
if (chosen == " ") {
  selbox.options[selbox.options.length] = new Option('Please select one of the options above first',' ');

}
if (chosen == "Corn Belt") {
  selbox.options[selbox.options.length] = new Option('Select a Co-op','Select a Co-op');  
  selbox.options[selbox.options.length] = new Option('Butler','Butler');
  selbox.options[selbox.options.length] = new Option('Calhoun','Calhoun');
  selbox.options[selbox.options.length] = new Option('Franklin','Franklin');
  selbox.options[selbox.options.length] = new Option('Grundy','Grundy');
  selbox.options[selbox.options.length] = new Option('Humboldt','Humboldt');
  selbox.options[selbox.options.length] = new Option('Iowa Lakes / Corn Belt','Iowa Lakes / Corn Belt');
  selbox.options[selbox.options.length] = new Option('Midland / Corn Belt','Midland / Corn Belt');
  selbox.options[selbox.options.length] = new Option('Prairie','Prairie');
  selbox.options[selbox.options.length] = new Option('Raccoon Valley','Raccoon Valley');
}
if (chosen == "CIPCO") {
  selbox.options[selbox.options.length] = new Option('Select a Co-op','Select a Co-op'); 
  selbox.options[selbox.options.length] = new Option('Clarke Electric Cooperative, Inc.','Clarke Electric Cooperative, Inc.');
  selbox.options[selbox.options.length] = new Option('Consumers Energy','Consumers Energy');
  selbox.options[selbox.options.length] = new Option('East-Central Iowa Rural Electric Cooperative','East-Central Iowa Rural Electric Cooperative');
  selbox.options[selbox.options.length] = new Option('Eastern Iowa Light &Power Cooperative','Eastern Iowa Light &Power Cooperative');
  selbox.options[selbox.options.length] = new Option('Farmers Electric Cooperative, Inc.','Farmers Electric Cooperative, Inc.');
  selbox.options[selbox.options.length] = new Option('Guthrie County REC Assn.','Guthrie County REC Assn.');
  selbox.options[selbox.options.length] = new Option('Linn County REC','Linn County REC');
  selbox.options[selbox.options.length] = new Option('Maquoketa Valley Electric Cooperative','Maquoketa Valley Electric Cooperative');
  selbox.options[selbox.options.length] = new Option('Midland Power Cooperative / CIPCO','Midland Power Cooperative / CIPCO');
  selbox.options[selbox.options.length] = new Option('Pella Cooperative Electric Assn.','Pella Cooperative Electric Assn.');
  selbox.options[selbox.options.length] = new Option('Southwest Iowa Rural Electric Cooperative','Southwest Iowa Rural Electric Cooperative');
  selbox.options[selbox.options.length] = new Option('T.I.P. REC','T.I.P. REC');
  selbox.options[selbox.options.length] = new Option('Bellevue Municipal Utilities','Bellevue Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Brooklyn Municipal Utilities','Brooklyn Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Cascade Municipal Utilities','Cascade Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Corning Municipal Utilities','Corning Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Durant Municipal Electric Plant','Durant Municipal Electric Plant');
  selbox.options[selbox.options.length] = new Option('Earlville Municipal Utilities','Earlville Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Fontanelle Municipal Utilities','Fontanelle Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Gowrie Municipal Utilities','Gowrie Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Greenfield Municipal Utilities','Greenfield Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Lamoni Municipal Utilities','Lamoni Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Lenox Municipal Utilities','Lenox Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Orient Municipal Utilities','Orient Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Stuart Municipal Utilities','Stuart Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Villisca Municipal Power Plant','Villisca Municipal Power Plant');
  selbox.options[selbox.options.length] = new Option('Winterset Municipal Utilities','Winterset Municipal Utilities');
  selbox.options[selbox.options.length] = new Option('Wilton Municipal Light and Power','Wilton Municipal Light and Power');
}
if (chosen == "L&O") {
  selbox.options[selbox.options.length] = new Option('Select a Co-op','Select a Co-op'); 
  selbox.options[selbox.options.length] = new Option('Lyon Rural Electric Cooperative','Lyon Rural Electric Cooperative');
  selbox.options[selbox.options.length] = new Option('Osceola Electric Cooperative','Osceola Electric Cooperative');
  selbox.options[selbox.options.length] = new Option('Test','Test');
}
if (chosen == "NIPCO") {
  selbox.options[selbox.options.length] = new Option('Select a Co-op','Select a Co-op'); 
  selbox.options[selbox.options.length] = new Option('Hinton','Hinton');
  selbox.options[selbox.options.length] = new Option('Anthon','Anthon');
  selbox.options[selbox.options.length] = new Option('Aurelia','Aurelia');
  selbox.options[selbox.options.length] = new Option('Onawa','Onawa');
  selbox.options[selbox.options.length] = new Option('Manning','Manning');
  selbox.options[selbox.options.length] = new Option('Mapleton','Mapleton');
  selbox.options[selbox.options.length] = new Option('Iowa Lakes EC','Iowa Lakes EC');
  selbox.options[selbox.options.length] = new Option('Harrison County REC','Harrison County REC');
  selbox.options[selbox.options.length] = new Option('Nishnabotna Valley REC','Nishnabotna Valley REC');
  selbox.options[selbox.options.length] = new Option('North West REC','North West REC');
  selbox.options[selbox.options.length] = new Option('Western Iowa Power Cooperative','Western Iowa Power Cooperative');
  selbox.options[selbox.options.length] = new Option('Woodbury County REC','Woodbury County REC');
}
}