js实现日历

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<!--
/* 调用方法：
<input onfocus="calendar()" name="s2" type="text" id="s2" style="width:100%;" />
*/
var cal_Width = 180;//定义日历显示的宽度，至少140

document.write("<div id='meizzCalendarLayer' style='position: absolute; z-index: 9999; width: " + (cal_Width+4).toString() + "px; height: 193px; display: none'>");
document.write("<iframe name='meizzCalendarIframe' scrolling='no' frameborder='0' width='100%' height='100%'></iframe></div>");
var WebCalendar = new WebCalendar();

function document.onclick()
{
if(WebCalendar.eventSrc != window.event.srcElement) hiddenCalendar();
}

function WebCalendar() //初始化日历的设置
{
    this.regInfo    = "WEB Calendar ver 3.0关闭的快捷键：[Esc]";

    this.dayShow    = 38;                       //定义页面上要显示的天数,不能小于35,或大于39
    this.daysMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
    this.day        = new Array(this.dayShow);            //定义日历展示用的数组
    this.dayObj     = new Array(this.dayShow);            //定义日期展示控件数组
    this.dateStyle = null;                     //保存格式化后日期数组
    this.objExport = null;                     //日历回传的显示控件
    this.eventSrc   = null;                     //日历显示的触发控件
    this.inputDate = null;                     //转化外的输入的日期(d/m/yyyy)
    this.thisYear   = new Date().getFullYear(); //定义年的变量的初始值
    this.thisMonth = new Date().getMonth()+ 1; //定义月的变量的初始值
    this.thisDay    = new Date().getDate();     //定义日的变量的初始值
    this.today      = this.thisDay +"/"+ this.thisMonth +"/"+ this.thisYear;   //今天(d/m/yyyy)
    this.iframe     = window.frames("meizzCalendarIframe"); //日历的 iframe 载体
    this.calendar   = getObjectById("meizzCalendarLayer"); //日历的层
    this.dateReg    = "";           //日历格式验证的正则式

    this.yearFall   = 50;           //定义显示的年份下拉框的年差值，如果今年是2000年，这里设置为50，就显示1950－2050
    this.format     = "yyyy-mm-dd"; //回传日期的格式
    this.timeShow   = false;        //是否返回时间
    this.drag       = true;         //是否允许拖动
    this.darkColor = "#95B7F3";    //控件的暗色
    this.lightColor = "#FFFFFF";    //控件的亮色
    this.btnBgColor = "#E6E6FA";    //控件的按钮背景色
    this.wordColor = "#000080";    //控件的文字颜色
    this.wordDark   = "#DCDCDC";    //控件的暗文字颜色
    this.dayBgColor = "#F5F5FA";    //日期数字背景色
    this.todayColor = "#FF0000";    //今天在日历上的标示背景色
    this.DarkBorder = "#D4D0C8";    //日期显示的立体表达色

    this.yearOption = "";
    var yearNow = new Date().getFullYear();
    yearNow = (yearNow <= 1000)? 1000 : ((yearNow >= 9999)? 9999 : yearNow);
    var yearMin = (yearNow - this.yearFall >= 1000) ? yearNow - this.yearFall : 1000;
    var yearMax = (yearNow + this.yearFall <= 9999) ? yearNow + this.yearFall : 9999;
        yearMin = (yearMax == 9999) ? yearMax-this.yearFall*2 : yearMin;
        yearMax = (yearMin == 1000) ? yearMin+this.yearFall*2 : yearMax;
    for (var i=yearMin; i<=yearMax; i++) this.yearOption += "<option value='"+i+"'>"+i+"年</option>";
}

    if (WebCalendar.drag){ strIframe += "<scr"+"ipt language=javascript>"+
    "var drag=false, cx=0, cy=0, o = parent.WebCalendar.calendar; function document.onmousemove(){"+
    "if(parent.WebCalendar.drag && drag){if(o.style.left=='')o.style.left=0; if(o.style.top=='')o.style.top=0;"+
    "o.style.left = parseInt(o.style.left) + window.event.clientX-cx;"+
    "o.style.top = parseInt(o.style.top) + window.event.clientY-cy;}}"+
    "function document.onkeydown(){ switch(window.event.keyCode){ case 27 : parent.hiddenCalendar(); break;"+
    "case 37 : parent.prevM(); break; case 38 : parent.prevY(); break; case 39 : parent.nextM(); break; case 40 : parent.nextY(); break;"+
    "case 84 : document.forms[0].today.click(); break;} " +
    "try{window.event.keyCode = 0; window.event.returnValue= false;}catch(ee){}}"+
    "function dragStart(){cx=window.event.clientX; cy=window.event.clientY; drag=true;}</scr"+"ipt>"}

    strIframe += "<table id=tableMain class=bg border=0 cellspacing=2 cellpadding=0>"+
    "<tr><td width='"+ cal_Width +"px' height='19px' bgcolor='"+ WebCalendar.lightColor +"'>"+
    "    <table width='"+ cal_Width +"px' id='tableHead' border='0' cellspacing='1' cellpadding='0'><tr align='center'>"+
    "    <td width='10%' height='19px' class='bg' title='向前翻 1 月快捷键：←' style='cursor: hand' onclick='parent.prevM()'><b><</b></td>"+
    "    <td width='45%' id=meizzYearHead "+
    "        onmouseover='this.bgColor=parent.WebCalendar.darkColor; this.style.color=parent.WebCalendar.lightColor'"+
    "        onmouseout='this.bgColor=parent.WebCalendar.lightColor; this.style.color=parent.WebCalendar.wordColor'>" +
    "<select name=tmpYearSelect onblur='parent.hiddenSelect(this)' style='width:100%;'"+
    "        onchange='parent.WebCalendar.thisYear =this.value; parent.hiddenSelect(this); parent.writeCalendar();'>";

//    var yearNow = new Date().getFullYear();
//    yearNow = (yearNow <= 1000)? 1000 : ((yearNow >= 9999)? 9999 : yearNow);
//    var yearMin = (yearNow - WebCalendar.yearFall >= 1000) ? yearNow - WebCalendar.yearFall : 1000;
//    var yearMax = (yearNow + WebCalendar.yearFall <= 9999) ? yearNow + WebCalendar.yearFall : 9999;
//        yearMin = (yearMax == 9999) ? yearMax-WebCalendar.yearFall*2 : yearMin;
//        yearMax = (yearMin == 1000) ? yearMin+WebCalendar.yearFall*2 : yearMax;
//    for (var i=yearMin; i<=yearMax; i++) strIframe += "<option value='"+i+"'>"+i+"年</option>";

    strIframe += WebCalendar.yearOption + "</select>"+
    "</td>"+
    "    <td width='35%' id=meizzYearMonth "+
    "        onmouseover='this.bgColor=parent.WebCalendar.darkColor; this.style.color=parent.WebCalendar.lightColor'"+
    "        onmouseout='this.bgColor=parent.WebCalendar.lightColor; this.style.color=parent.WebCalendar.wordColor'>" +
    "<select name=tmpMonthSelect onblur='parent.hiddenSelect(this)' style='width:100%;'" +
    "        onchange='parent.WebCalendar.thisMonth=this.value; parent.hiddenSelect(this); parent.writeCalendar();'>";
    for (var i=1; i<13; i++) strIframe += "<option value='"+i+"'>"+i+"月</option>";
    strIframe += "</select>"+
    "</td>"+
    "    <td width='10%' class=bg title='向后翻 1 月快捷键：→' onclick='parent.nextM()' style='cursor: hand'><b>></b></td></tr></table>"+
    "</td></tr><tr><td height='20px'>"+
    "<table id=tableWeek border=1 width='"+ cal_Width +"px' cellpadding=0 cellspacing=0 ";
    if(WebCalendar.drag){strIframe += "onmousedown='dragStart()' onmouseup='drag=false' ";}
    strIframe += " borderColorLight='"+ WebCalendar.darkColor +"' borderColorDark='"+ WebCalendar.lightColor +"'>"+
    "    <tr align=center><td height='20px'>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr></table>"+
    "</td></tr><tr><td valign=top width='"+ cal_Width +"px' bgcolor='"+ WebCalendar.lightColor +"'>"+
    "    <table id=tableDay height='120px' width='"+ cal_Width +"px' border=0 cellspacing=1 cellpadding=0>";
         for(var x=0; x<5; x++){
           strIframe += "<tr>";
           for(var y=0; y<7; y++)
             strIframe += "<td class=out id='meizzDay"+ (x*7+y) +"'></td>";
           strIframe += "</tr>";
         }
         strIframe += "<tr>";
         for(var x=35; x<WebCalendar.dayShow; x++)
           strIframe += "<td class=out id='meizzDay"+ x +"'></td>";
         strIframe +="<td colspan="+(42-WebCalendar.dayShow).toString()+" class=out style='text-align:center;' title='"+ WebCalendar.regInfo +"'>" +
         "<input style=' background-color: " + WebCalendar.btnBgColor +";cursor: hand; padding-top: 2px; width: 44%; height: 100%;' onfocus='this.blur()'"+
         " type=button value='清空' onclick='parent.WebCalendar.objExport.value=\"\";parent.hiddenCalendar()'>" +
         " " +
         "<input style=' background-color: " + WebCalendar.btnBgColor +";cursor: hand; padding-top: 2px; width: 43%; height: 100%;' onfocus='this.blur()'"+
         " type=button value='关闭' onclick='parent.hiddenCalendar()'>" +
         "</td></tr></table>"+
    "</td></tr><tr><td height='20px' width='"+ cal_Width +"px' bgcolor='"+ WebCalendar.lightColor +"'>"+
    "    <table border=0 cellpadding=1 cellspacing=0 width='"+ cal_Width +"px'>"+
    "    <tr><td><input name=prevYear title='向前翻 1 年快捷键：↑' onclick='parent.prevY()' type=button value='<<'"+
    "    onfocus='this.blur()' style='meizz:expression(this.disabled=parent.WebCalendar.thisYear==1000)'><input"+
    "    onfocus='this.blur()' name=prevMonth title='向前翻 1 月快捷键：←' onclick='parent.prevM()' type=button value='< '>"+
    "    </td><td align=center><input name=today type=button value='Today' onfocus='this.blur()' style='width: 50px;' title='当前日期快捷键：T'"+
    "    onclick=\"parent.returnDate(new Date().getDate() +'/'+ (new Date().getMonth() +1) +'/'+ new Date().getFullYear())\">"+
    "    </td><td align=right><input title='向后翻 1 月快捷键：→' name=nextMonth onclick='parent.nextM()' type=button value=' >'"+
    "    onfocus='this.blur()'><input name=nextYear title='向后翻 1 年快捷键：↓' onclick='parent.nextY()' type=button value='>>'"+
    "    onfocus='this.blur()' style='meizz:expression(this.disabled=parent.WebCalendar.thisYear==9999)'></td></tr></table>"+
    "</td></tr><table></form></body></html>";
    with(WebCalendar.iframe)
    {
        document.writeln(strIframe); document.close();
        for(var i=0; i<WebCalendar.dayShow; i++)
        {
            WebCalendar.dayObj[i] = eval("meizzDay"+ i);
            WebCalendar.dayObj[i].onmouseover = dayMouseOver;
            WebCalendar.dayObj[i].onmouseout = dayMouseOut;
            WebCalendar.dayObj[i].onclick     = returnDate;
        }
    }
}

function calendar() //主调函数
{
    var e = window.event.srcElement;   writeIframe();
    var o = WebCalendar.calendar.style; WebCalendar.eventSrc = e;
if (arguments.length == 0) WebCalendar.objExport = e;
    else WebCalendar.objExport = eval(arguments[0]);

    WebCalendar.iframe.tableWeek.style.cursor = WebCalendar.drag ? "move" : "default";
var t = e.offsetTop, h = e.clientHeight, l = e.offsetLeft, p = e.type;
while (e = e.offsetParent){t += e.offsetTop; l += e.offsetLeft;}
    o.display = ""; WebCalendar.iframe.document.body.focus();
    var cw = WebCalendar.calendar.clientWidth, ch = WebCalendar.calendar.clientHeight;
    var dw = document.body.clientWidth, dl = document.body.scrollLeft, dt = document.body.scrollTop;

    if (document.body.clientHeight + dt - t - h >= ch) o.top = (p=="image")? t + h : t + h + 6;
    else o.top = (t - dt < ch) ? ((p=="image")? t + h : t + h + 6) : t - ch;
    if (dw + dl - l >= cw) o.left = l; else o.left = (dw >= cw) ? dw - cw + dl : dl;

if (!WebCalendar.timeShow) WebCalendar.dateReg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/;
else WebCalendar.dateReg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/;

    try{
        if (WebCalendar.objExport.value.trim() != ""){
            WebCalendar.dateStyle = WebCalendar.objExport.value.trim().match(WebCalendar.dateReg);
            if (WebCalendar.dateStyle == null)
            {
                WebCalendar.thisYear   = new Date().getFullYear();
                WebCalendar.thisMonth = new Date().getMonth()+ 1;
                WebCalendar.thisDay    = new Date().getDate();
                alert("原文本框里的日期有错误！\n可能与你定义的显示时分秒有冲突！");
                writeCalendar(); return false;
            }
            else
            {
                WebCalendar.thisYear   = parseInt(WebCalendar.dateStyle[1], 10);
                WebCalendar.thisMonth = parseInt(WebCalendar.dateStyle[3], 10);
                WebCalendar.thisDay    = parseInt(WebCalendar.dateStyle[4], 10);
                WebCalendar.inputDate = parseInt(WebCalendar.thisDay, 10) +"/"+ parseInt(WebCalendar.thisMonth, 10) +"/"+
                parseInt(WebCalendar.thisYear, 10); writeCalendar();
            }
        } else {
          WebCalendar.thisYear   = new Date().getFullYear();
          WebCalendar.thisMonth = new Date().getMonth()+ 1;
          WebCalendar.thisDay    = new Date().getDate();
          writeCalendar();
        }
    } catch(e) {
      WebCalendar.thisYear   = new Date().getFullYear();
      WebCalendar.thisMonth = new Date().getMonth()+ 1;
      WebCalendar.thisDay    = new Date().getDate();
      writeCalendar();
    }
}

function funMonthSelect() //月份的下拉框
{
    var m = isNaN(parseInt(WebCalendar.thisMonth, 10)) ? new Date().getMonth() + 1 : parseInt(WebCalendar.thisMonth);
    var e = WebCalendar.iframe.document.forms[0].tmpMonthSelect;
    e.value = m; //e.focus();
    //window.status = e.style.left;
}

function funYearSelect() //年份的下拉框
{
    var e = WebCalendar.iframe.document.forms[0].tmpYearSelect;
    var y = isNaN(parseInt(WebCalendar.thisYear, 10)) ? new Date().getFullYear() : parseInt(WebCalendar.thisYear);
    e.value = y; //e.focus();
//    if(e.value == "")
//    {
//      e.value = new Date().getFullYear();
//      WebCalendar.thisYear = e.value;
//    }
}

function prevM() //往前翻月份
{
    WebCalendar.thisDay = 1;
    if (WebCalendar.thisMonth==1)
    {
        WebCalendar.thisYear--;
        WebCalendar.thisMonth=13;
    }
    WebCalendar.thisMonth--; writeCalendar();
}