javascript验证函数收集

/* 检测输入是否为EMAIL格式 */
function checkEmail(input)
{
var isEmail = //w+([-+.]/w+)*@/w+([-.]/w+)*/./w+([-.]/w+)*/;
return isEmail.exec(input);
}
/* 身份证格式验证 */
function issfzok(s)
{
var aCity="11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51,52,53,54,61,62,63,64,65,71,81,82,91,"
var iSum=0
var info=""
var sId=""
if (s.length==15)
sId=s.substr(0,6)+"19"+s.substr(6,9)+"0";
else if (s.length==18)
sId=s;
else
return "身份证位数不对.";

xb=Number(sId.substr(16,1))%2;

if(!/^/d{17}(/d|x)$/i.test(sId)) return "身份证中有非法字符.";
sId=sId.replace(/x$/i,"a");
if(aCity.indexOf(sId.substr(0,2))==-1)	return "非法地区.";
sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2));
var d=new Date(sBirthday.replace(/-/g,"/"))
if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))
return "身份证错误：非法生日.";
if (s.length==18)
{
for(var i = 17;i>=0;i --)
iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11);
if(iSum%11!=1) return "校验错误.";
}
return "";
}

/* 解析JSON*/
String.prototype.parseJSON = function () {
try {
return !(/[^,:{}/[/]0-9./-+Eaeflnr-u /n/r/t]/.test(
this.replace(/"(//.|[^"//])*"/g, ''))) &&
eval('(' + this + ')');
} catch (e) {
return false;
}
};