<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<script>
	$(function() {
		$( "#from" ).datepicker({
		  changeMonth: false,
		  numberOfMonths: 2,
		  defaultDate: +1,
		  maxDate: "+2y",
		  altField:"#from",
		  altFormat:"yy-mm-dd",
		  changeYear: true,
		  monthNames: ['1','2','3','4','5','6','7','8','9','10','11','12'],
		  onSelect: function( selectedDate ) {
			var nextday = new Date(selectedDate);
			nextday.setDate(nextday.getDate());
			$( "#to" ).datepicker( "option", "minDate", nextday );
			$( "#to" ).datepicker( "option", "defaultDate", 0);
		  }
		});

		$( "#to" ).datepicker({
		  changeMonth: false,
		  numberOfMonths: 2,
		  defaultDate: +2,
		  altField:"#to",
		  altFormat:"yy-mm-dd",
		  monthNames: ['1','2','3','4','5','6','7','8','9','10','11','12'],
		  changeYear: true,
		  minDate:"+2d",
		  maxDate: "+2y +1m",
		  onSelect: function( selectedDate ) {
		  }
		});

		$( "#wr_8" ).datepicker({
		  numberOfMonths: 2,
		  minDate:"-30d",
		  maxDate: "+2y",
		  altField:"#wr_8",
		  altFormat:"yy-mm-dd",
		  changeYear: true,
		  monthNames: ['1','2','3','4','5','6','7','8','9','10','11','12']
		});

	});
    // 날짜 차이 계산 함수
    // date1 : 기준 날짜(YYYY-MM-DD), date2 : 대상 날짜(YYYY-MM-DD)
     function getDateDiff(date1,date2)
     {
         var arrDate1 = date1.split("-");
         var getDate1 = new Date(parseInt(arrDate1[0]),arrDate1[1]-1,arrDate1[2]);
         var arrDate2 = date2.split("-");
         var getDate2 = new Date(parseInt(arrDate2[0]),arrDate2[1]-1,arrDate2[2]);
         
         var getDiffTime = getDate1.getTime() - getDate2.getTime();
         
         return Math.floor(getDiffTime / (1000 * 60 * 60 * 24));
     }

//alert(getDateDiff("2014-07-20","2014-07-8"));
</script>
<tr>
	<th>기간</th>
	<td>
		<?
		$arr_wr_3 = explode("|^|", $write['wr_3']);
		?>
		<input type="text" name="from" value="<?php echo $arr_wr_3[0] ?>" id="from" required class="frm_input required" size="30" maxlength="100">
		<input type="text" name="to" value="<?php echo $arr_wr_3[1] ?>" id="to" required class="frm_input required" size="30" maxlength="100">
	</td>
</tr>