function isInt(str)
{
    var regu = /^0|([1-9]\d*)$/;
    return regu.test(str.Trim());
}
function isEmpty(str)
{
	return str.Trim() == "";
}
function isDecimal(str)
{
    var reg = /^\d+([.]?[0-9]+)?$/;
    return reg.test(str.Trim());
}
function isUserName(str)
{
    var reg = /^[a-zA-Z]\w{4,19}$/;
    return reg.test(str.Trim());
}
function isTel(str)
{
    var reg = /^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$/;
    return reg.test(str.Trim());
}
function isMobile(str)
{
    var reg = /^((\(\d{2,3}\))|(\d{3}\-))?(13|15|18)\d{9}$/;
    return reg.test(str.Trim());
}
function isEmail(str)
{
    var reg = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
    return reg.test(str.Trim());
}
function isQQ(str)
{
    var reg = /^[1-9]\d{4,10}$/;
    return reg.test(str.Trim());
}
function isIdCard(obj)
{
    var personId = obj.value?obj.value:obj;
    personId = personId.toUpperCase();
    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X。   
    if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(personId)))
    {
        return false;
    }
    //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
    //下面分别分析出生日期和校验位 
    var len, re;
    len = personId.length;
    if (len == 15)
    {
        re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
        var arrSplit = personId.match(re);

        //检查生日日期是否正确 
        var dtmBirth = new Date("19" + arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
        var bGoodDay;
        bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
        if (!bGoodDay)
        {
            return false;
        } else
        {
            //将15位身份证转成18位
            //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。 
            var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
            var arrCh = new Array("1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2");
            var nTemp = 0, i;
            personId = personId.substr(0, 6) + "19" + personId.substr(6, personId.length - 6);
            for (i = 0; i < 17; i++)
            {
                nTemp += personId.substr(i, 1) * arrInt[i];
            }
            personId += arrCh[nTemp % 11];
            return personId;
        }
    }
    if (len == 18)
    {
        re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
        var arrSplit = personId.match(re);

        //检查生日日期是否正确 
        var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
        var bGoodDay;
        bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
        if (!bGoodDay)
        {
            //alert(dtmBirth.getYear());
            //alert(arrSplit[2]);
            return false;
        } else
        {
            //检验18位身份证的校验码是否正确。
            //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。 
            var valnum;
            var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
            var arrCh = new Array("1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2");
            var nTemp = 0, i;
            for (i = 0; i < 17; i++)
            {
                nTemp += personId.substr(i, 1) * arrInt[i];
            }
            valnum = arrCh[nTemp % 11];
            if (valnum != personId.substr(17, 1))
            {
                return false;
            }
            //return personId;
        }
    }
    return true;
}