var heihei = new Date();
var countyear = heihei.getYear();
var countmonth = heihei.getMonth();
var countday = heihei.getDate();
function healthtime()
{
	document.health.year.value = countyear;
	document.health.month.value = countmonth+1;
	document.health.day.value = countday;
}

function haha()
{
	if (document.health.year.value=="" || document.health.month.value=="" || document.health.day.value =="")
	{
		alert("请填写完整年月日!");
		return false;
	}
	if (document.health.year.value>2050 || document.health.year.value<1990)
	{
		alert("请填写正确年份!");
		document.health.year.focus();
		return false;
	}
	if (document.health.month.value>12 || document.health.month.value<1)
	{
		alert("请填写正确月份!");
		document.health.month.focus();
		return false;
	}
	if (document.health.day.value>31 || document.health.day.value<1)
	{
		alert("请填写正确日子!");
		document.health.day.focus();
		return false;
	}
	if (!isDate(document.health.year.value ,document.health.month.value ,document.health.day.value))
	{
		alert("年月日组合有错,请重新填写!");
		return false;
	}
	function isDate (year, month, day)
	{
		// month argument must be in the range 1 - 12
		month = month - 1;  // javascript month range : 0- 11
		var tempDate = new Date(year,month,day);
		if ( (year2k(tempDate.getYear()) == year) && (month == tempDate.getMonth()) && (day == tempDate.getDate()) )
		{
			return true;
		}
		else
		{
			return false;
		}
	}
	function year2k(d)
	{
		return (d < 1000) ? d + 1900 : d;
	}
	if (document.health.mweek.value==3)
	{
		var stime = document.health.month.value + "/" + document.health.day.value + "/" + document.health.year.value;
		var stime2 = Date.parse(stime) + 39*7*24*3600*1000;
		var yuchan2 = new Date(stime2);
		var yuchan4 = new String(yuchan2);
		var yuchan3 = yuchan4.split(" ");
		var yuchanmonth = "";
		if (yuchan3[1]=="Jan") yuchanmonth="1";
		if (yuchan3[1]=="Feb") yuchanmonth="2";
		if (yuchan3[1]=="Mar") yuchanmonth="3";
		if (yuchan3[1]=="Apr") yuchanmonth="4";
		if (yuchan3[1]=="May") yuchanmonth="5";
		if (yuchan3[1]=="Jun") yuchanmonth="6";
		if (yuchan3[1]=="Jul") yuchanmonth="7";
		if (yuchan3[1]=="Aug") yuchanmonth="8";
		if (yuchan3[1]=="Sep") yuchanmonth="9";
		if (yuchan3[1]=="Oct") yuchanmonth="10";
		if (yuchan3[1]=="Nov") yuchanmonth="11";
		if (yuchan3[1]=="Dec") yuchanmonth="12";
		var yuchan = yuchan3[5] + "-" + yuchanmonth + "-" + yuchan3[2];
		var nowt = new Date();
		var nowtime = nowt.getTime();
		var chatime = nowtime - Date.parse(stime);
		var chaweek = Math.floor((chatime)/(1000*60*60*24*7));
		if (chaweek<0) chaweek=0;
		if (chaweek>41) alert("你的预产期已过!");
		document.health.yuchan.value = yuchan;
		document.health.yuchan2.value = chaweek;
		return false;
	}
	if (document.health.mweek.value==4)
	{
		var stime = document.health.month.value + "/" + document.health.day.value + "/" + document.health.year.value;
		var stime2 = Date.parse(stime) + 40*7*24*3600*1000;
		var yuchan2 = new Date(stime2);
		var yuchan4 = new String(yuchan2);
		var yuchan3 = yuchan4.split(" ");
		var yuchanmonth = "";
		if (yuchan3[1]=="Jan") yuchanmonth="1";
		if (yuchan3[1]=="Feb") yuchanmonth="2";
		if (yuchan3[1]=="Mar") yuchanmonth="3";
		if (yuchan3[1]=="Apr") yuchanmonth="4";
		if (yuchan3[1]=="May") yuchanmonth="5";
		if (yuchan3[1]=="Jun") yuchanmonth="6";
		if (yuchan3[1]=="Jul") yuchanmonth="7";
		if (yuchan3[1]=="Aug") yuchanmonth="8";
		if (yuchan3[1]=="Sep") yuchanmonth="9";
		if (yuchan3[1]=="Oct") yuchanmonth="10";
		if (yuchan3[1]=="Nov") yuchanmonth="11";
		if (yuchan3[1]=="Dec") yuchanmonth="12";
		var yuchan = yuchan3[5] + "-" + yuchanmonth + "-" + yuchan3[2];
		var nowt = new Date();
		var nowtime = nowt.getTime();
		var chatime = nowtime - Date.parse(stime);
		var chaweek = Math.floor((chatime)/(1000*60*60*24*7));
		if (chaweek<0) chaweek=0;
		if (chaweek>42) alert("你的预产期已过!");
		document.health.yuchan.value = yuchan;
		document.health.yuchan2.value = chaweek;
		return false;
	}
	if (health.mweek.value==5)
	{
		var stime = document.health.month.value + "/" + document.health.day.value + "/" + document.health.year.value;
		var stime2 = Date.parse(stime) + 41*7*24*3600*1000;
		var yuchan2 = new Date(stime2);
		var yuchan4 = new String(yuchan2);
		var yuchan3 = yuchan4.split(" ");
		var yuchanmonth = "";
		if (yuchan3[1]=="Jan") yuchanmonth="1";
		if (yuchan3[1]=="Feb") yuchanmonth="2";
		if (yuchan3[1]=="Mar") yuchanmonth="3";
		if (yuchan3[1]=="Apr") yuchanmonth="4";
		if (yuchan3[1]=="May") yuchanmonth="5";
		if (yuchan3[1]=="Jun") yuchanmonth="6";
		if (yuchan3[1]=="Jul") yuchanmonth="7";
		if (yuchan3[1]=="Aug") yuchanmonth="8";
		if (yuchan3[1]=="Sep") yuchanmonth="9";
		if (yuchan3[1]=="Oct") yuchanmonth="10";
		if (yuchan3[1]=="Nov") yuchanmonth="11";
		if (yuchan3[1]=="Dec") yuchanmonth="12";
		var yuchan = yuchan3[5] + "-" + yuchanmonth + "-" + yuchan3[2];
		var nowt = new Date();
		var nowtime = nowt.getTime();
		var chatime = nowtime - Date.parse(stime);
		var chaweek = Math.floor((chatime)/(1000*60*60*24*7));
		if (chaweek<0) chaweek=0;
		if (chaweek>43) alert("你的预产期已过!");
		document.health.yuchan.value = yuchan;
		document.health.yuchan2.value = chaweek;
		return false;
	}
}