var element = document.getElementById("select元素的id"); var selectedValue = element.options[element.selctedIndex].value
select-one 还是 select-mutiple?
功能是CHECK一堆SELECT,如果有重复值得话,则报ERROR
var element = document.getElementById("select元素的id"); var selectedValue = element.options[element.selctedIndex].value这么写的话,为什么告诉我options[..]是NULL?
var element = document.getElementById("select元素的id"); var selectedValue = element.options[element.selctedIndex].value 初始化select元素element.selectedindex=0;
var selectedValue = element.options[element.selctedIndex].value
还是 select-mutiple?
var selectedValue = element.options[element.selctedIndex].value这么写的话,为什么告诉我options[..]是NULL?
var selectedValue = element.options[element.selctedIndex].value
初始化select元素element.selectedindex=0;
element.selctedIndex -> element.selectedIndex少写了个e