function Amount() {
var YueRental = document.getElementById("YueRental").value;
var MonthRental = document.getElementById("MonthRental");
var HalfYearRental = document.getElementById("HalfYearRental");
var YeahRental = document.getElementById("YeahRental");
MonthRental.value = Number(YueRental) * 3;
HalfYearRental.value = Number(YueRental) * 6;
YeahRental.value = Number(YueRental) * 12;
var date1 = document.getElementById("RendStartDate").value; //开始时间
var date2 = document.getElementById("RendEndDate").value; //结束时间
var date3 = getMonthNumber(date1, date2);
var TotalAmount = document.getElementById("TotalAmount");
//保留四位小数
TotalAmount.value =( Number(date3) * Number(YueRental)).toFixed(4);
}
function getMonthNumber(date1, date2) {
//默认格式为"20030303",根据自己需要改格式和方法
var year1 = date1.substr(0, 4);
var year2 = date2.substr(0, 4);
var month1 = date1.substr(5, 2);
var month2 = date2.substr(5, 2);
var len = (year2 - year1) * 12 + (month2 - month1);
var day = date2.substr(8, 2) - date1.substr(8, 2);
if (day > 0) {
len += 1;
}
else if (day < 0)
{
len -= 1;
}
return len;
}