常用公歷日期處理程序
<script?language="JavaScript">
<!--
//程序:常用公歷日期處理程序
//作者:梅雪香(meixx)
//時間:忘了
/**//*用相對不規則的字符串來創建日期對象,不規則的含義為:順序包含年月日三個數值串,有間隔*/
String.prototype.parseDate?=?function()
{
????var?ar?=?(this?+?",0,0,0").match(/\d+/g);
????return?ar[5]?(new?Date(ar[0],ar[1]-1,ar[2],ar[3],ar[4],ar[5])):(new?Date());
}
/**//*
?*?功能:根據輸入表達式返回日期字符串
?*?參數:dateFmt:字符串,由以下結構組成????
?*??????yy:長寫年,YY:短寫年mm:數字月,MM:英文月,dd:日,hh:時,
?*??????mi:分,ss秒,ms:毫秒,we:漢字星期,WE:英文星期.
?*??????isFmtWithZero?:?是否用0進行格式化,true?or?false
?*?返回:對應日期的中文字符串
*/
Date.prototype.toString?=?function(dateFmt,isFmtWithZero){
????dateFmt?=?(dateFmt?==?null???"yy-mm-dd?hh:mi:ss"?:?dateFmt);
????if(typeof(dateFmt)?!=?"string"?)
????????throw?(new?Error(-1,?'toString()方法的第一個參數為字符串類型!'));
????isFmtWithZero?=?!!isFmtWithZero;
????var?weekArr=[["日","一","二","三","四","五","六"],["SUN","MON","TUR","WED","THU","FRI","SAT"]];
????var?monthArr=["JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"];
????var?str=dateFmt;
????var?o?=?{
????????"yy"?:?this.getFullYear(),
????????"YY"?:?this.getYear(),
????????"mm"?:?this.getMonth()+1,
????????"MM"?:?monthArr[this.getMonth()],
????????"dd"?:?this.getDate(),
????????"hh"?:?this.getHours(),
????????"mi"?:?this.getMinutes(),
????????"ss"?:?this.getSeconds(),
????????"we"?:?"星期"?+?weekArr[0][this.getDay()],
????????"WE"?:?weekArr[1][this.getDay()]
????}
????for(var?i?in?o){
????????str?=?str.replace(new?RegExp(i,"g"),o[i].toString().fmtWithZero(isFmtWithZero));
????}
????str?=?str.replace(/ms/g,this.getMilliseconds().toString().fmtWithZeroD(isFmtWithZero));
????return?str;
}
/**//*將一位數字格式化成兩位,如:?9?to?09*/
String.prototype.fmtWithZero?=?function(isFmtWithZero){????
????return?(isFmtWithZero?&&?/^\d$/.test(this))?"0"+this:this;
}
String.prototype.fmtWithZeroD?=?function(isFmtWithZero){????
????return?(isFmtWithZero?&&?/^\d{2}$/.test(this))?"00"+this:((isFmtWithZero?&&?/^\d$/.test(this))?"0"+this:this);
}
/**//*?功能?:?返回與某日期相距N天(N個24小時)的日期
?*?參數?:?num?number類型?可以為正負整數或者浮點數,默認為1;
?*????????type?0(秒)?or?1(天),默認為天
?*?返回?:?新的Date對象
?*/
Date.prototype.dateAfter=function(num,type){
????num?=?(num?==?null?1:num);
????if(typeof(num)!="number")?throw?new?Error(-1,"dateAfterDays(num,type)的num參數為數值類型.");
????type?=?(type==null?1:type);
????var?arr?=?[1000,86400000];
????return?new?Date(this.valueOf()?+?num*arr[type]);
}
//判斷是否是閏年,返回true?或者?false
Date.prototype.isLeapYear?=?function?(){
????var?year?=?this.getFullYear();
????return?(0==year%4?&&?((year?%?100?!=?0)||(year?%?400?==?0)));
}
//返回該月天數
Date.prototype.getDaysOfMonth?=?function?(){
????return?(new?Date(this.getFullYear(),this.getMonth()+1,0)).getDate();
}
//日期比較函數,參數date:為Date類型,如this日期晚于參數:1,相等:0?早于:?-1
Date.prototype.dateCompare?=?function(date){
????if(typeof(date)?!=?"object"?||?!(/Date/.test(date.constructor)))
?????????throw?new?Error(-1,"dateCompare(date)的date參數為Date類型.");
????var?d?=?this.getTime()?-?date.getTime();
????return?d>0?1:(d==0?0:-1);
}
/**//*功能:返回兩日期之差
?*參數:pd???PowerDate對象
?*????type:?返回類別標識.yy:年,mm:月,ww:周,dd:日,hh:小時,mi:分,ss:秒,ms:毫秒
?*????intOrFloat?:返回整型還是浮點型值?0:整型,不等于0:浮點型
?*????output?:?輸出提示,如:時間差為#周!
?*/
Date.prototype.calDateDistance?=?function?(date,type,intOrFloat,output){
????if(typeof(date)?!=?"object"?||?!(/Date/.test(date.constructor)))
?????????throw?new?Error(-1,"calDateDistance(date,type,intOrFloat)的date參數為Date類型.");
????type?=?(type==null?'dd':type);
????if(!((new?RegExp(type+",","g")).test("yy,mm,ww,dd,hh,mi,ss,ms,")))
?????????throw?new?Error(-1,"calDateDistance(pd,type,intOrFloat,output)的type參數為非法.");
????var?iof?=?(intOrFloat==null?0:intOrFloat);
????var?num=0;
????var?o?=?{
????????"ww"?:?7*86400000,
????????"dd"?:?86400000,
????????"hh"?:?3600000,
????????"mi"?:?60000,
????????"ss"?:?1000,
????????"ms"?:?1
????}
????switch(type){
????????case?"yy":?num?=?this.getFullYear()?-?date.getFullYear();?break;
????????case?"mm":?num?=?(this.getFullYear()?-?date.getFullYear())*12+this.getMonth()-date.getMonth();?break;
????????default:?
????????????var?sub?=?this.valueOf()?-?date.valueOf();
????????????if?(o[type])
????????????????num?=?(sub/o[type]).fmtRtnVal(iof);
????????????break;
????}
????return?(output???output.replace(/#/g,"?"+num+"?")?:?num);
}
//返回整數或者兩位小數的浮點數
Number.prototype.fmtRtnVal?=?function?(intOrFloat){
????return?(intOrFloat?==?0???Math.floor(this)?:?parseInt(this*100)/100);
}
//根據當前日期所在年和周數返回周日的日期
Date.prototype.RtnByWeekNum?=?function?(weekNum){
????if(typeof(weekNum)?!=?"number")
????????throw?new?Error(-1,"RtnByWeekNum(weekNum)的參數是數字類型.");
????var?date?=?new?Date(this.getFullYear(),0,1);
????var?week?=?date.getDay();
????week?=?(week==0?7:week);
????return?date.dateAfter(weekNum*7-week,1);
}
//根據日期返回該日期所在年的周數
Date.prototype.getWeekNum?=?function?(){
????var?dat?=?new?Date(this.getFullYear(),0,1);
????var?week?=?dat.getDay();
????week?=?(week==0?7:week);
????var?days?=?this.calDateDistance(dat,"dd")+1;
????return?((days?+?6?-?this.getDay()?-?7?+?week)/7);
}
//-->
</script>
<script?language="JavaScript">
<!--
var?dw?=?document.write;
var?date2?=?"2005-12-30".parseDate();
dw(date2,"<br>");
var?date3?=?"2006-1-10?11?11?11".parseDate();
dw(date2.calDateDistance(date3,null,null,"時間差為#天!"));
//alert(new?Date(2000,2,-29));
//-->
</script>posted on 2006-09-27 06:50
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