The official document: http://www.my97.net/demo/index.htm
My97 onchage failure event
Check the official documentation found onpicked can replace onchange event
H5
<input type="text" opt="aaa" class="Wdate" onclick="WdatePicker({onpicked:function(dp){change(this,dp);},readOnly:true,dateFmt:'yyyy-MM-dd'})" value ="2018-01-02"/>
JS
function change(obj,dp){
var date=dp.cal.getNewDateStr();//dp My97对象
var name = $(obj).val();//obj input对象
alert(name);
}