问题一:
<input type="text" id="txt1" value="" onpropertychange="txt2.value=txt1.value"><br>
<input type="text" id="txt2" value="">
<input type="text" id="txt1" value="" onpropertychange="txt2.value=txt1.value"><br>
<input type="text" id="txt2" value="">
var Addmonth= time.getMonth() + 1;具体代码,自己写。
var time = new Date("1909/01/02");
var Addmonth= time.getMonth() + 2;
alert (Addmonth)
</script>