var a6101=jQuery('#A6101').val();
var a6102=jQuery('#A6102').val();
if (a6101.length >= 4 && a6102.length >= 4) {
var month = (a6102.substr(0, 4) - a6101.substr(0, 4)) * 12 + (a6102.substr(4, 2) - a6101.substr(4, 2));
var year = Math.floor(month / 12);
var month2 = month % 12;
if (month2 > 0 && month2 <= 6)
year = year + 0.5;
else if(month2 > 6)
year = year + 1;
jQuery('#A6104').val(year);
将整数转换成一位小数
a0133 = parseInt(a0133) + parseFloat(Math.round(xmonth * 10) / 100);