首先2个文本框应该都是readonly的 在第一个文本框上设置onpropertychange="pro_change(this)" function pro_change(obj){ var str = ""; if(obj.value!=""){ var v = obj.value.replace("-","/"); var d = new Date(v); d.setTime(d.getTime()+7*24*60*60*1000); var month = d.getMonth()+1; var day = d.getDate(); str = d.getFullYear()+"-"+(month<10?"0"+month:month)+"-"+(day<10?"0"+day:day);
在第一个文本框上设置onpropertychange="pro_change(this)"
function pro_change(obj){
var str = "";
if(obj.value!=""){
var v = obj.value.replace("-","/");
var d = new Date(v);
d.setTime(d.getTime()+7*24*60*60*1000);
var month = d.getMonth()+1;
var day = d.getDate();
str = d.getFullYear()+"-"+(month<10?"0"+month:month)+"-"+(day<10?"0"+day:day);
}
document.getElementById("txt2").value = str;//假设第二个文本框的ID为txt2
}