获得当前日期

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title>获得当前日期</title>
   
  <script type="text/javascript">
    function getCurrentDate(){
       var tick = new Date();
       var years = tick.getYear();
       var months = tick.getMonth() < 9 ? '0' + (tick.getMonth()+1) : tick.getMonth()+1;        
       var days = tick.getDate() < 10 ? '0' + tick.getDate() : tick.getDate();  

       var weekName = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
       var weekIndex = tick.getDay();

       var currentDate  =  years+ "-" + months +"-"+ days+ "  "+ weekName[weekIndex] ;      
       
       return currentDate;
    }

 

    function test(){
       document.getElementsByName("currentDate")[0].value = getCurrentDate();
    }
  </script>
 </head>

 <body>
   <input type="text" name="currentDate" size="30">
   <input type="button" value="获得当前日期" onclick="test()" >
 </body>
</html>