javascript常用的正则表达式实例(9)

function f_check_time(obj)  
    {  
        var time = Trim(obj.value);  
        var dtype = obj.eos_datatype;  
        var format = dtype.substring(dtype.indexOf("(")+1,dtype.indexOf(")"));  //日期格式  
        var datePat,matchArray,year,month,day,hour,minute,second;  

        if(/^(y{4})(-|\/)(M{1,2})\2(d{1,2}) (HH:mm:ss)$/.test(format))  
            datePat = /^(\d{4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;  
        else if(/^(y{4})(年)(M{1,2})(月)(d{1,2})(日)(HH时mm分ss秒)$/.test(format))  
            datePat = /^(\d{4})年(\d{1,2})月(\d{1,2})日(\d{1,2})时(\d{1,2})分(\d{1,2})秒$/;  
        else if(format == "yyyyMMddHHmmss")  
            datePat = /^(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})$/;  
        else 
        {  
            f_alert(obj,"日期格式不对");  
            return false;  
        }  
        matchArray = time.match(datePat);  
        if(matchArray == null)   
        {  
            f_alert(obj,"日期长度不对,或日期中有非数字符号");  
            return false;  
        }  
        if(/^(y{4})(-|\/)(M{1,2})\2(d{1,2}) (HH:mm:ss)$/.test(format))  
        {  
            year = matchArray[1];  
            month = matchArray[3];  
            day = matchArray[4];  
            hour = matchArray[5];  
            minute = matchArray[6];  
            second = matchArray[7];  
        } else 
        {  
            year = matchArray[1];  
            month = matchArray[2];  
            day = matchArray[3];  
            hour = matchArray[4];  
            minute = matchArray[5];  
            second = matchArray[6];  
        }  
        if (month < 1 || month > 12)  
        {               
            f_alert(obj,"月份应该为1到12的整数");  
            return false;  
        }  
        if (day < 1 || day > 31)  
        {             
            f_alert(obj,"每个月的天数应该为1到31的整数");  
            return false;  
        }       
        if ((month==4 || month==6 || month==9 || month==11) && day==31)  
        {           
            f_alert(obj,"该月不存在31号");  
            return false;  
        }       
        if (month==2)  
        {  
            var isleap=(year % 4==0 && (year % 100 !=0 || year % 400==0));  
            if (day>29)  
            {                 
                f_alert(obj,"2月最多有29天");  
                return false;  
            }  
            if ((day==29) && (!isleap))  
            {                 
                f_alert(obj,"闰年2月才有29天");  
                return false;  
            }  
        }  
        if(hour<0 || hour>23)  
        {  
            f_alert(obj,"小时应该是0到23的整数");  
            return false;  
        }  
        if(minute<0 || minute>59)  
        {  
            f_alert(obj,"分应该是0到59的整数");  
            return false;  
        }  
        if(second<0 || second>59)  
        {  
            f_alert(obj,"秒应该是0到59的整数");  
            return false;  
        }  
        return true;  
    }  
       

/*判断当前对象是否可见*/