jquery：
$(function(){
$("#select").change(function(){
var text = $('#select option:selected').text();
var val = $('#select').val()
console.log(val)
console.log(text)
})
})
原生js：
var select = document.getElementById('select')
select.addEventListener('change',function(){
var index = select.selectedIndex;
console.log(select.options[index].text);
console.log(select.options[index].value);
})
