日期:2014-05-16  浏览次数:20524 次

js 某一天为星期几的代码
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>标题页</title>
</head>
<body>
<SCRIPT LANGUAGE="LiveScript">
function checkNum(str, min, max) {    //检测输入的数值
        if (str == "") {        
                alert("请输入有效的值.");        
                return false;    
        }    
        for (var i = 0; i < str.length; i++) {        
                var ch = str.substring(i, i + 1);        
                if (ch < "0" || ch > "9") {            
                        alert("请输入数值.");            
                        return false;        
                }    
        }    
        var val = parseInt(str, 10);    
        if ((val < min) || (val > max)) {        
                alert("请输入数值从 1 到 "+max+".");        
                return false;    
        }    
        return true;
}
function pushbutton(form){     
        //检查年月日的有效性                           
        if ((checkNum(form.day.value,1,31)) && (checkNum(form.month.value,1,12)) && (checkNum(form.year.value,0,2500))){
                var cur_day = parseInt(form.day.value,10);      //获取日
                var cur_month = parseInt(form.month.value,10);  //获取月
                var cur_year = parseInt(form.year.value,10);    //获取年
        }
        getDayOfWeek(cur_year+"-"+cur_month+"-"+cur_day);               //调用判断星期几的方法
}
function getDayOfWeek(dayValue){ 
    var day = new Date(Date.parse(dayValue.replace(/-/g, '/')));                             //将日期值格式化 
    var today = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");  //创建星期数组
    alert( today[day.getDay()])                                                             //返一个星期中的某一天,其中0为星期日 
} 
</SCRIPT>
<FORM NAME = "calDay">
<PRE><B>日:</B>   
<INPUT TYPE="num" name="day" onChange="if (!checkNum(this.value, 1, 31)){this.focus();this.select();} else {}" size=10 value="">        
<B>月:</B> 
<INPUT TYPE="num" name="month" onChange="if (!checkNum(this.value, 1, 12)){this.focus();this.select();} else {}" size=10 value="">
<B>年:</B>  
<INPUT TYPE="num" name="year" onChange="if (!checkNum(this.value, 0, 2500)){this.focus();this.select();} else {}" size=10 value="">        
<INPUT TYPE="button" name="Find_Out" value="计算星期几" onclick="pushbutton(this.form)"></PRE>
</FORM>
</body>
</html>

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