<script language=javascript>
Date.prototype.format = function(format)
{
var o =
{
"M+" : this.getMonth()+1, //month
"d+" : this.getDate(), //day
"h+" : this.getHours(), //hour
"m+" : this.getMinutes(), //minute
"s+" : this.getSeconds(), //second
"q+" : Math.floor((this.getMonth()+3)/3), //quarter
"S" : this.getMilliseconds() //millisecond
}
if(/(y+)/.test(format))
format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
for(var k in o)
if(new RegExp("("+ k +")").test(format))
format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
return format;
}function chkDate11(byvDate)
{
var y = new Date().getFullYear();
var m = new Date().getMonth();
var d = new Date().getDate();
var today=y+'/'+m+'/'+d;
var d1 = new Date(today);
var d2 = new Date(byvDate);
//alert(d2)
if (d1.format("yyyy/MM/dd") > d2.format("yyyy/MM/dd") )
{return d1;}
else
{
return d2;}
}
alert(chkDate11("2007/12/01").format("yyyy/MM/dd"))
</script>
Date.prototype.format = function(format)
{
var o =
{
"M+" : this.getMonth()+1, //month
"d+" : this.getDate(), //day
"h+" : this.getHours(), //hour
"m+" : this.getMinutes(), //minute
"s+" : this.getSeconds(), //second
"q+" : Math.floor((this.getMonth()+3)/3), //quarter
"S" : this.getMilliseconds() //millisecond
}
if(/(y+)/.test(format))
format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4 - RegExp.$1.length));
for(var k in o)
if(new RegExp("("+ k +")").test(format))
format = format.replace(RegExp.$1,RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length));
return format;
}function chkDate11(byvDate)
{
var y = new Date().getFullYear();
var m = new Date().getMonth();
var d = new Date().getDate();
var today=y+'/'+m+'/'+d;
var d1 = new Date(today);
var d2 = new Date(byvDate);
//alert(d2)
if (d1.format("yyyy/MM/dd") > d2.format("yyyy/MM/dd") )
{return d1;}
else
{
return d2;}
}
alert(chkDate11("2007/12/01").format("yyyy/MM/dd"))
</script>
解决方案 »
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<!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>
<title> new document </title>
<meta name="generator" content="editplus" />
<meta name="author" content="Gao YiXiang" />
<meta name="email" content="[email protected]" />
<meta name="keywords" content="javascript dhtml dom" />
<meta name="description" content="I love web development." />
</head>
<body>
<script type="text/javascript">
<!--
var byvDate='2007-12-01', today='2007-12-11';
var d1 = new Date(byvDate.replace("-", "/"));
var d2 = new Date(today.replace("-", "/"));if (d1 > d2)
{
alert("byvDate > today");
}
else if (d1 < d2)
{
alert("byvDate < today");
}
else
{
alert("byvDate = today");
}
//-->
</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> new document </title>
<meta name="generator" content="editplus" />
<meta name="author" content="Gao YiXiang" />
<meta name="email" content="[email protected]" />
<meta name="keywords" content="javascript dhtml dom" />
<meta name="description" content="I love web development." />
</head>
<body>
<script type="text/javascript">
<!--
var byvDate='2007-12-01', today='2007-12-11';
var d1 = Date.parse(byvDate.replace("-", "/"));
var d2 = Date.parse(today.replace("-", "/"));if (d1 > d2)
{
alert("byvDate > today");
}
else if (d1 < d2)
{
alert("byvDate < today");
}
else
{
alert("byvDate = today");
}
//-->
</script>
</body>
</html>
如果你的日期格式这么标准的话,直接比较大小就OK了
alert(byvDate > today);
alert(byvDate < today);
alert(byvDate == today);
<script type="text/javascript">
<!--
var byvDate='2007-12-01', today='2007-12-11';
var d1 = Date.parse(byvDate.replace("-", "/"));
var d2 = Date.parse(today.replace("-", "/"));
if (d1 > d2)
{
alert("byvDate > today");
}
else if (d1 < d2)
{
alert("byvDate < today");
}
else
{
alert("byvDate = today");
}
//-->
</script>
上面这段代码在.aspx文件里运行是没有问题的;
但是把它放到.js文件就是不行,主要表现在无法比较
function chkDate11(byvDate)
{
var y = new Date().getFullYear();
var m = new Date().getMonth();
var d = new Date().getDate();
var today=y+'-'+m+'-'+d;
if ( today > byvDate) //我检查过,主要是这个if语句无法正常运行?
{alert(today);
return today;
}
else
{alert(byvDate);
return byvDate; //if (today>byvDate)无论哪个值大,都运行else语句后的,这是为什么?}
}
...
......
var temp=null;
temp=chkDate11(returnValue);
...
......
}
function chkDate11(byvDate)
{
var y = new Date().getFullYear();
var m = new Date().getMonth()+1;
var d = new Date().getDate();
var today=y+'-'+m+'-'+d;
var d1 = new Date(today.replace("-", "/")); //主要是这句话起作用
var d2 = new Date(byvDate.replace("-", "/"));
if ( d1 > d2)
{alert('选择日期必须大于等于今天!');
return today;
}
else
{return byvDate;
}
}特别感谢斑竹:天外水火(我要多努力)
也感谢其他各位的热心帮助!