通过js来实现用身份证号来判断性别和出生年月

html:

<input type="text" id="shenfenzhenghao" oninput="hao()" placeholder="证件号"><input type="text" id="xingbie" disabled="disabled" placeholder="性别"><input type="date" id="shengri" disabled="disabled" placeholder="出生年月">

js:

// 通过身份证号来获取性别和生日//出生年月function hao() {// 获取身份证号的input标签let IDNu = document.getElementById('shenfenzhenghao');console.log(IDNu);var re =/^\d{6}(((19|20)\d{2}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])\d{3}([0-9]|x|X))|(\d{2}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])\d{3}))$/;if (!re.test(IDNu.value)) {// alert("身份证号码有误,请重新填写!");IDNu.focus();//location.replace("");return false;}var str = IDNu.value;console.log(str);var born_border = document.getElementById('shengri');try {if (typeof(eval(born_border)) == "undefined") {//alert('参数born_border为空');} else {born_border.value = str.substring(6, 10) + "-" + str.substring(10, 12) + "-" + str.substring(12, 14);}} catch (e) {//alert('参数born_border错误');}//性别 let sew = ''var sec = str.substring(16, 17);var sex = document.getElementById('xingbie');if (sec % 2 == 0) {sew = "女";} else {sew = "男";}console.log(sew);sex.value = sew;for (i = 0; i < sex.options.length; i++)if (sex.options[i].value == sew) {sex.options[i].selected = true;}}