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
 */
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enableKeyboard:true,
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whichDayIsfirstWeek:4,
position:{},
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dateFmt:"yyyy-MM-dd",
realDateFmt:"yyyy-MM-dd",
realTimeFmt:"HH:mm:ss",
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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,

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在页面中的input语句如下， <td><input class="custome_birthday" type="text" placeholder="生日"></td> <td><input class="custome_birthday" type="text" placeholder="生日"></td> ,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"
            });
        });