js
选项一 选项二
function gradeChange() { var myselect = document.getElementById("pid"); var index=myselect.selectedIndex;
// selectedIndex代表的是你所选中项的index
var value = myselect.options[index].value;
console.log(value);
}jquery
<select id="select" > <option value="op1">option1</option> <option value="op2">option2</option> <option value="op3">option3</option> <option value="op4">option4</option></select>
$('#select').change(function() {
//一:
console.log($(this).val());
//二:
var options=$("#select option:selected");
console.log(options.val());
})