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老外写的一个javascript上Date格式化函数

热度:419   发布时间:2012-11-15 15:16:14.0
老外写的一个javascript下Date格式化函数
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">

  <script>
     Date.prototype.format = function(mask) { 
  
     var d = this; 
  
     var zeroize = function (value, length) { 
  
         if (!length) length = 2; 
  
         value = String(value); 
  
         for (var i = 0, zeros = ''; i < (length - value.length); i++) { 
  
             zeros += '0'; 
  
         } 
  
         return zeros + value; 
  
     };   
  
     return mask.replace(/"[^"]*"|'[^']*'|\b(?:d{1,4}|m{1,4}|M{1,4}|yy(?:yy)?|([hHMstT])\1?|[lLZ])\b/g, function($0) {
  
         switch($0) { 
  
             case 'd':   return d.getDate(); 
  
             case 'dd':  return zeroize(d.getDate()); 
  
             case 'ddd': return ['Sun','Mon','Tue','Wed','Thr','Fri','Sat'][d.getDay()]; 
  
             case 'dddd':    return ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'][d.getDay()]; 
  
             case 'M':   return d.getMonth() + 1; 
  
             case 'MM':  return zeroize(d.getMonth() + 1); 
  
             case 'MMM': return ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'][d.getMonth()]; 
  
             case 'MMMM':
             return ['January','February','March','April','May','June','July','August','September','October','November','December'][d.getMonth()]; 
  
             case 'yy':  return String(d.getFullYear()).substr(2); 
  
             case 'yyyy':    return d.getFullYear(); 
  
             case 'h':   return d.getHours() % 12 || 12; 
  
             case 'hh':  return zeroize(d.getHours() % 12 || 12); 
  
             case 'H':   return d.getHours(); 
  
             case 'HH':  return zeroize(d.getHours()); 
  
             case 'm':   return d.getMinutes(); 
  
             case 'mm':  return zeroize(d.getMinutes()); 
  
             case 's':   return d.getSeconds(); 
  
             case 'ss':  return zeroize(d.getSeconds()); 
  
             case 'l':   return zeroize(d.getMilliseconds(), 3); 
  
             case 'L':   var m = d.getMilliseconds(); 
  
                     if (m > 99) m = Math.round(m / 10); 
  
                     return zeroize(m); 
  
             case 'tt': 
                    return d.getHours() < 12 ? 'am' : 'pm'; 
               
             case 'TT':  return d.getHours() < 12 ? 'AM' : 'PM'; 
  
             case 'Z':   return d.toUTCString().match(/[A-Z]+$/); 
  
             // Return quoted strings with the surrounding quotes removed 
  
             default:    return $0.substr(1, $0.length - 2); 
  
         } 
  
     }); 
  
}; 

function init(){
    var date = new Date();
    alert(date.format("MMMM dd,yyyy"));
}
  </script>
</HEAD>

<BODY onload="init();">

</BODY>
</HTML>
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