js 根据年月计算各周起止日期

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin

function calldate()
{

   var year = document.getElementById("selYear");
   var month = document.getElementById("selMonth");
    var selDay=document.getElementById("selDay");
   var y ;
   var m;
y= year.options[year.selectedIndex].value;
m=month.options[month.selectedIndex].value;
var c;
c=solarDays(y,m);

   delselect(selDay);
   setDay(y,m,c,selDay);

}

   //日期设置
   function setDay(y,m,d,selDay)
   {


    for(var i=1;i<=d;i++)
{
   var temp_btime=new Date(y+"/"+m+"/"+i);//获取选择年月的1号
     var tempnum=temp_btime.getDay();//获取选择日期的星期几0表示日

if(tempnum==0){tempnum=7}
     // alert(tempnum);
if(tempnum==1)
{
//begin_temp2=(new Date(begin_temp2.setDate(begin_temp2.getDate()+7)));
    var endweek= (new Date(temp_btime.setDate( (temp_btime.getDate()+6))))
    var t_year=endweek.getYear();
var t_month = endweek.getMonth();
    var t_date = endweek.getDate();

var newopt = new Option();
newopt.text=m+"月"+i+"日-"+(t_month+1)+"月"+t_date+"日";
newopt.value =i;
selDay.options.add(newopt);
}

}
   }

//删除select
function delselect(obj)
{
   while (obj.length>0)
     {
    obj.remove(obj.length-1);
     }
}
//当月的天数
function solarDays(y,m) {
var solarMonth=new Array(31,28,31,30,31,30,31,31,30,31,30,31);
   if(m==2)
      return(((y%4 == 0) && (y%100 != 0) || (y%400 == 0))? 29: 28)
   else
      return(solarMonth[m-1])
}

// End -->
</script>

<label>
<select name="selYear" id="selYear" onchange="calldate();">

</select>
</label>
<label>
<select name="selMonth" id="selMonth" onchange="calldate();">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>

</select>
</label>
<label>
<select name="selDay" id="selDay">

</select>
</label>
</body>
<script>
function setYear(y)
{
// var isdate= new Date();

// var year=isdate.getFullYear();//获取当前年

for(var i=0;i<sel.options.length;i++)
     {
         if(sel.options[i].value == month.getMonth()+1)
         {
             sel.options[i].selected = true;


         }
     }

}
else
{
for(var i=0;i<sel.options.length;i++)
     {

         if(sel.options[i].value ==m)
         {
             sel.options[i].selected = true;


         }
     }
}

}

function selectDay(d)
{

var sel=document.getElementById("selDay");
for(var i=0;i<sel.options.length;i++)
{
if(sel.options[i].value==d)
{
sel.options[i].selected = true;
}
}

}

setYear(2008);
setMonth(12);
calldate();

selectDay(29);
</script>
</html>

posted @ 2009-01-07 16:01 Mating_luo 阅读(2532) 评论(0) 收藏举报

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js 根据年月计算各周起止日期

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