如何通过JS对身份证号验证呢？
html xmlns=http://www。w3。org/1999/xhtml headtitle标题页-学无忧（www。xue51。com）/titleSCRIPT LANGUAGE=JavaScriptfunction isCardNo(num){if (isNaN(num)) {alert(输入的不全是数字！); return false;}var len = num。 length, re; if (len == 15) //15位身份证的判断re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);else if (...全部
html xmlns=http://www。w3。org/1999/xhtml headtitle标题页-学无忧（www。xue51。com）/titleSCRIPT LANGUAGE=JavaScriptfunction isCardNo(num){if (isNaN(num)) {alert(输入的不全是数字！); return false;}var len = num。
length, re; if (len == 15) //15位身份证的判断re = new RegExp(/^(\d{6})()?(\d{2})(\d{2})(\d{2})(\d{3})$/);else if (len == 18)//18位身份证的判断re = new RegExp(/^(\d{6})()?(\d{4})(\d{2})(\d{2})(\d{3})(\d)$/);else {alert(输入的数字位数不对！); return false;}var a = num。
match(re);//判断是否有符合条件的表达式if (a != null){if (len==15){//对15位身份证中日期的判断var D = new Date(19+a[3]+/+a[4]+/+a[5]);var B = D。
getYear()==a[3](D。getMonth()+1)==a[4]D。getDate()==a[5];}else{//对18位身份证中日期的判断var D = new Date(a[3]+/+a[4]+/+a[5]);var B = D。
getFullYear()==a[3](D。getMonth()+1)==a[4]D。getDate()==a[5];}if (!B) {alert(输入的身份证号 + a[0] + 里出生日期不对！); return false;}}return true;}/script/headbodyinput type=text name=txt1 value=1110120780423003input type=button value=判断身份证号 onClick=javascript:alert(isCardNo(txt1。
value))/body/html。收起
