selectBox

selectBox

device=['aaa','bbb','ccc','ddd'];
var str ='';

for(i=0;i<4;i++){ 
    str +='<option value= " ' +device[i] +'">'+device[i]+'</option>'; // html에 options명 추가 
}
document.getElementById('sel').innerHTML = str;

//selectbox 선택 sel.options[0]....
    for(i=0; i<sel.options.length; i++) {
           if(sel.options[0].selected == true || sel.options[1].selected == true) { //선택된 옵션값 
               ......

               break;

            }else if(sel.options[2].selected == true||sel.options[3].selected == true){
                .....      
                break;

            }else{
                console.log("error");
            }

        }