jquery实现input点击输入框弹出日期

这个功能使用到了jQuery中的focus函数，

所需的js,

/*
 * My97 DatePicker 4.8 Beta1
 * License: http://www.my97.net/dp/license.asp
 */
var $dp,WdatePicker;(function(){var $={
$langList:[{
	name:"en",charset:"UTF-8"},
	{name:"zh-cn",charset:"gb2312"},
	{name:"zh-tw",charset:"GBK"}
],
$skinList:[
	{name:"default",charset:"gb2312"},
	{name:"whyGreen",charset:"gb2312"}
],
$wdate:true,
$crossFrame:true,
$preLoad:false,
doubleCalendar:false,
enableKeyboard:true,
enableInputMask:true,
autoUpdateOnChanged:null,
whichDayIsfirstWeek:4,
position:{},
lang:"auto",
skin:"default",
dateFmt:"yyyy-MM-dd",
realDateFmt:"yyyy-MM-dd",
realTimeFmt:"HH:mm:ss",
realFullFmt:"%Date %Time",
minDate:"1900-01-01 00:00:00",
maxDate:"2099-12-31 23:59:59",
startDate:"",
alwaysUseStartDate:false,
yearOffset:1911,
firstDayOfWeek:0,
isShowWeek:false,
highLineWeekDay:true,
isShowClear:true,
isShowToday:true,
isShowOK:true,
isShowOthers:true,
readOnly:false,
errDealMode:0,
autoPickDate:null,
qsEnabled:true,
autoShowQS:false,

specialDates:null,specialDays:null,disabledDates:null,disabledDays:null,opposite:false,errMsg:"",quickSel:[],has:{},getRealLang:function(){var _=$.$langList;for(var A=0;A<_.length;A++)if(_[A].name==this.lang)return _[A];return _[0]}};WdatePicker=T;var X=window,S={innerHTML:""},M="document",H="documentElement",C="getElementsByTagName",U,A,R,G,a,W=navigator.appName;if(W=="Microsoft Internet Explorer")R=true;else if(W=="Opera")a=true;else G=true;A=J();if($.$wdate)K(A+"skin/WdatePicker.css");U=X;if($.$crossFrame){try{while(U.parent&&U.parent[M]!=U[M]&&U.parent[M][C]("frameset").length==0)U=U.parent}catch(N){}}if(!U.$dp)U.$dp={ff:G,ie:R,opera:a,status:0,defMinDate:$.minDate,defMaxDate:$.maxDate};B();if($.$preLoad&&$dp.status==0)E(X,"onload",function(){T(null,true)});if(!X[M].docMD){E(X[M],"onmousedown",D);X[M].docMD=true}if(!U[M].docMD){E(U[M],"onmousedown",D);U[M].docMD=true}E(X,"onunload",function(){if($dp.dd)O($dp.dd,"none")});function B(){U.$dp=U.$dp||{};obj={$:function($){return(typeof $=="string")?X[M].getElementById($):$},$D:function($,_){return this.$DV(this.$($).value,_)},$DV:function(_,$){if(_!=""){this.dt=$dp.cal.splitDate(_,$dp.cal.dateFmt);if($)for(var B in $)if(this.dt[B]===undefined)this.errMsg="invalid property:"+B;else{this.dt[B]+=$[B];if(B=="M"){var C=$["M"]>0?1:0,A=new Date(this.dt["y"],this.dt["M"],0).getDate();this.dt["d"]=Math.min(A+C,this.dt["d"])}}if(this.dt.refresh())return this.dt}return""},show:function(){var A=U[M].getElementsByTagName("div"),$=100000;for(var B=0;B$)$=_}this.dd.style.zIndex=$+2;O(this.dd,"block")},hide:function(){O(this.dd,"none")},attachEvent:E};for(var $ in obj)U.$dp[$]=obj[$];$dp=U.$dp}function E(A,$,_){if(R)A.attachEvent($,_);else if(_){var B=$.replace(/on/,"");_._ieEmuEventHandler=function($){return _($)};A.addEventListener(B,_._ieEmuEventHandler,false)}}function J(){var _,A,$=X[M][C]("script");for(var B=0;B<$.length;B++){_=$[B].getAttribute("src");_=_.substr(0,_.toLowerCase().indexOf("wdatepicker.js"));A=_.lastIndexOf("/");if(A>0)_=_.substring(0,A+1);if(_)break}return _}function K(A,$,B){var D=X[M][C]("HEAD").item(0),_=X[M].createElement("link");if(D){_.href=A;_.rel="stylesheet";_.type="text/css";if($)_.title=$;if(B)_.charset=B;D.appendChild(_)}}function F($){$=$||U;var A=0,_=0;while($!=U){var D=$.parent[M][C]("iframe");for(var F=0;F_.scrollTop||A.scrollLeft>_.scrollLeft))?A:_;return{"top":B.scrollTop,"left":B.scrollLeft}}function D($){var _=$?($.srcElement||$.target):null;try{if($dp.cal&&!$dp.eCont&&$dp.dd&&_!=$dp.el&&$dp.dd.style.display=="block")$dp.cal.close()}catch($){}}function Y(){$dp.status=2}var P,_;function T(L,D){$dp.win=X;B();L=L||{};for(var J in $)if(J.substring(0,1)!="$"&&L[J]===undefined)L[J]=$[J];if(D){if(!K()){_=_||setInterval(function(){if(U[M].readyState=="complete")clearInterval(_);T(null,true)},50);return}if($dp.status==0){$dp.status=1;L.el=S;I(L,true)}else return}else if(L.eCont){L.eCont=$dp.$(L.eCont);L.el=S;L.autoPickDate=true;L.qsEnabled=false;I(L)}else{if($.$preLoad&&$dp.status!=2)return;var H=F();if(H){L.srcEl=H.srcElement||H.target;H.cancelBubble=true}L.el=L.el=$dp.$(L.el||L.srcEl);if(!L.el||L.el["My97Mark"]===true||L.el.disabled||($dp.dd&&O($dp.dd)!="none"&&$dp.dd.style.left!="-970px")){L.el["My97Mark"]=false;return}I(L);if(H&&L.el.nodeType==1&&L.el["My97Mark"]===undefined){L.el["My97Mark"]=false;var A,C;if(H.type=="focus"){A="onclick";C="onfocus"}else{A="onfocus";C="onclick"}E(L.el,A,L.el[C])}}function K(){if(R&&U!=X&&U[M].readyState!="complete")return false;return true}function F(){if(G){func=F.caller;while(func!=null){var $=func.arguments[0];if($&&($+"").indexOf("Event")>=0)return $;func=func.caller}return null}return event}}function Q(_,$){return _.currentStyle?_.currentStyle[$]:document.defaultView.getComputedStyle(_,false)[$]}function O(_,$){if(_)if($!=null)_.style.display=$;else return Q(_,"display")}function I(G,_){var D=G.el?G.el.nodeName:"INPUT";if(_||G.eCont||new RegExp(/input|textarea|div|span|p|a/ig).test(D))G.elProp=D=="INPUT"?"value":"innerHTML";else return;if(G.lang=="auto")G.lang=R?navigator.browserLanguage.toLowerCase():navigator.language.toLowerCase();if(!G.eCont)for(var C in G)$dp[C]=G[C];if(!$dp.dd||G.eCont||($dp.dd&&(G.getRealLang().name!=$dp.dd.lang||G.skin!=$dp.dd.skin))){if(G.eCont)E(G.eCont,G);else{$dp.dd=U[M].createElement("DIV");$dp.dd.style.cssText="position:absolute";U[M].body.appendChild($dp.dd);E($dp.dd,G);if(_)$dp.dd.style.left=$dp.dd.style.top="-970px";else{$dp.show();B($dp)}}}else if($dp.cal){$dp.show();$dp.cal.init();if(!$dp.eCont)B($dp)}function E(F,E){F.innerHTML="";var D=F.lastChild.contentWindow[M],_=$.$langList,C=$.$skinList,H=E.getRealLang();F.lang=H.name;F.skin=E.skin;var G=[""];for(var I=0;I");G.push("");G.push("");G.push("");E.setPos=B;E.οnlοad=Y;D.write("");D.cfg=E;D.write(G.join(""))}function B(I){var G=I.position.left,B=I.position.top,C=I.el;if(C==S)return;if(C!=I.srcEl&&(O(C)=="none"||C.type=="hidden"))C=I.srcEl;var H=V(C),$=F(X),D=L(U),A=Z(U),E=$dp.dd.offsetHeight,_=$dp.dd.offsetWidth;if(isNaN(B))B=0;if(B!="under"&&(($.topM+H.bottom+E>D.height)&&($.topM+H.top-E>0)))B+=A.top+$.topM+H.top-E-2;else B+=A.top+$.topM+Math.min(H.bottom,D.height-E)+2;if(isNaN(G))G=0;G+=A.left+Math.min($.leftM+H.left,D.width-_-5)-(R?2:0);I.dd.style.top=B+"px";I.dd.style.left=G+"px"}}})()

在页面中的input语句如下，   ,js中实现点击弹框弹出日期：

    // 生日
        $(".custome_birthday").focus(function () {
            if ($(this).val() == this.defaultValue)
                $(this).val("");
            WdatePicker({
                el: this,
                readOnly: true,
                dateFmt: "yyyy/MM/dd"
            });
        });