比较两个日期相差天数

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>比较两个日期相差天数</title>
<script language="javascript">
function strToDate(str)
        {
           
var arys= new Array();
            arys
=str.split('-');
           
var newDate=new Date(arys[0],parseInt(arys[1], 10) - 1,arys[2]);
           
return newDate;
        }
function days_between(date1,date2){
 
var ONE_DAY=1000*60*60*24;
 
var date1_ms = date1.getTime();
 
var date2_ms = date2.getTime();
 
 
var difference_ms = Math.abs(date1_ms- date2_ms);
 
return Math.round(difference_ms/ONE_DAY);
}
function plus(){
 
var date1 = strToDate(document.forms[0].date1.value);
 
var date2 = strToDate(document.forms[0].date2.value);
  alert(
"日期相差天数为:" + days_between(date1,date2));
}
</script>
</head>

<body>
<form id="form1" name="form1" method="post" action="">
 
<label>Date1
 
<input type="text" name="date1" />
 
</label>
 
<p>
   
<label>Date2
   
<input type="text" name="date2" />
   
</label>
 
</p>
 
<p>
   
<label>Compute
   
<input type="submit" name="Submit" value="提交" onclick="plus()" />
   
</label>
 
</p>
</form>
</body>
</html>

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