มีปีญหาเรื่อง ฟังก์ชัน Date ครับ คือว่า ผมส่งค่า วัน-เดือน-ปี ไปเป็นแบบช่วง เช่น 01JAN09 - 31JAN09

<script>
var  SearchDay={
	search:0,
	day_list:new Array('SUN','MON','TUE','WED','THU','FRI','SAT'),
	mon_list:new Array("JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"),
	d2s:60*60*24*1000, 
	date:new Date(),
	start:new Date(),
	end:new Date(),
	get:function(){
		var count=0;
		while(this.start<this.end){
			if(this.start.getDay() ==this.search)count++;
			this.start.setTime(this.start.getTime()+this.d2s);
		}
		alert(count);
	},
	set:function(start,end,search){
		for(i=0;i<7;i++){
			if(this.day_list[i]==search)this.search=i
		}
		var sDate =start.substr(0,2);
		var sMon=start.substr(2,3);
		var sYear="20"+start.substr(5,2);
		var eDate =end.substr(0,2);
		var eMon=end.substr(2,3);
		var eYear="20"+end.substr(5,2);
		for(i=0;i<12;i++){
			if(this.mon_list[i]==sMon)sMon=i;
			if(this.mon_list[i]==eMon)eMon=i;
		}		
		this.start.setFullYear(sYear,sMon,sDate);
		this.end.setFullYear(eYear,eMon,eDate);
		this.get();
	}
}
</script>

$start_date = '2009-01-01'; 
$check_date = $start_date; 
$end_date = '2009-01-31'; 

while ($check_date != $end_date) { 
    $check_date = date ("Y-m-d", strtotime ("+1 day", strtotime($check_date))); 
//echo date ("D,Y-m-d", strtotime ("+1 day", strtotime($check_date))); 
//echo"<br>";
//echo date ("w,Y-m-d", strtotime ("+1 day", strtotime($check_date))); 
//echo"<br>";
if (date ("w,Y-m-d", strtotime ("today", strtotime($check_date)))==3 ){
    echo $check_date . '<br>'; 
}
}