<div style="padding:20px 40px;">         <h1 style="font-size:20px;color:#999;">身份证查询</h1>         <input type="text" placeholder="输入身份证号" id="code">         <input type="button" value="查询" id="btn">         <p id="home"><strong>籍    贯：</strong><span></span></p>         <p id="birthday"><strong>出生日期：</strong><span></span></p>         <p id="sex"><strong>性    别：</strong><span></span></p>     </div>     <script type="text/javascript">         //去掉字符串头尾空格           var home='',birthday='',sex='';         function trim(str) {               return str.replace(/^\s*|\s*$/g, "");           }         //验证身份证         function IdentityCodeValid(code) {             code=trim(code);             var city={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门"};                if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)){                 alert("身份证号格式错误");                 home='',birthday='',sex='';                 return false;             }             if(!city[code.substring(0,2)]){                 alert("地址编码错误");                 home='',birthday='',sex='';                 return false;             }             if(code.length == 18){    //18位身份证需要验证最后一位校验位                 var codeArr = code.split('');                        var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];    //加权因子                                var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];                        //校验位                 var sum = 0;                 for (var i = 0; i < 17; i++){                     sum += codeArr[i] * factor[i];                 }                 if(parity[sum % 11] != codeArr[17]){                     alert("校验位错误");                     home='',birthday='',sex='';                     return false;                 }                            }             //省份             home = city[code.substring(0,2)];                //生日             birthday = code.substring(6,10)+'年'+code.substring(10,12)+'月'+code.substring(12,14)+'日';             //性别             if(code.length==15){                 sex = code.substring(14,15)%2==0 ? '女':'男';             }else if(code.length==18){                 sex = code.substring(14,17)%2==0 ? '女':'男';             }         }            //输出结果         document.querySelector('#btn').onclick=function(){             var code=document.querySelector('#code').value;             IdentityCodeValid(code);             document.querySelector('#home span').innerHTML=home;             document.querySelector('#birthday span').innerHTML=birthday;             document.querySelector('#sex span').innerHTML=sex;         }     </script>