// JavaScript Document
function valDateFmt(datefmt) {
	myOption = -1;
	for (i=0; i<datefmt.length; i++) {
		if (datefmt[i].checked) {myOption = i;}
	}
	if (myOption == -1) {alert("You must select a date format");return ' ';}
	return datefmt[myOption].value;
}
function valDateRng(daterng) {
	myOption = -1;
	for (i=0; i<daterng.length; i++) {
		if (daterng[i].checked) myOption = i;
	}
	if (myOption == -1) {
		alert("You must select a date range");
		return ' ';
	}
	return daterng[myOption].value;
}
function stripBlanks(fld) {
	var result = "";
	var c=0;
	for (i=0; i<fld.length; i++) {
		if (fld.charAt(i) != " " || c > 0) {
			result += fld.charAt(i);
			if (fld.charAt(i) != " ") c = result.length;
		}
	}
	return result.substr(0,c);
}
var numb = '0123456789';
function isValid(parm,val) {
	if (parm == "") return true;
	for (i=0; i<parm.length; i++) {
		if (val.indexOf(parm.charAt(i),0) == -1) return false;
	}
	return true;
}
function isNumber(parm) {return isValid(parm,numb);}
var mth = new Array(' ','january','february','march','april','may','june','july','august','september','october','november','december');
var day = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
var aryDateErrors=["Only blanks were supplied",//-1,
	'No separators were found ("/", ".", "-" or spaces between month, day and year',//-2
	"Programmer required value not supplied for format ('W', 'J' or 'U')",//-3
	"Day of month could not be resolved as a number",//-4
	"Month could not be resolved as a number",//-5
	"Year could not be resolved as a number",//-6
	"Year is outside the range of 1582 to 4881",//-7
	"Month is not between 1 and 12",//-8
	"Day of month is not valid for the month",//-9
	"Your provided date for this field must be but is not in the past",//-10
	"Your provided date for this field must be but is not in the future",
	"Programmer required value not supplied for range ('P', 'A' or 'F')"];//-12
function validateDate(fld,fmt,rng) {//fld is string value (of field);   fmt: "J"=ymd, "W"=dmy, "U"=mdy;   rng: "P"=past "A"=any "F"=future
	var dd, mm, yy;
	var today = new Date;
	var t = new Date;
	fld = stripBlanks(fld);
	if (fld == '') return -1;
	var sepAry=[" ","\/",".","-"];
	for(var i=0;i<4;i++){
		var d1 = fld.split(sepAry[i]);
		if (d1.length == 3) break;
	}
	if (i==4) return -2;
	if (fmt == 'u' || fmt == 'U') {
	  dd = d1[1]; mm = d1[0]; yy = d1[2];
	}else if (fmt == 'j' || fmt == 'J') {
	  dd = d1[2]; mm = d1[1]; yy = d1[0];
	}else if (fmt == 'w' || fmt == 'W'){
	  dd = d1[0]; mm = d1[1]; yy = d1[2];
	}else return -3;
	var n = dd.lastIndexOf('st');
	if (n > -1) dd = dd.substr(0,n);
	n = dd.lastIndexOf('nd');
	if (n > -1) dd = dd.substr(0,n);
	n = dd.lastIndexOf('rd');
	if (n > -1) dd = dd.substr(0,n);
	n = dd.lastIndexOf('th');
	if (n > -1) dd = dd.substr(0,n);
	n = dd.lastIndexOf(',');
	if (n > -1) dd = dd.substr(0,n);
	n = mm.lastIndexOf(',');
	if (n > -1) mm = mm.substr(0,n);
	if (!isNumber(dd)) return -4;
	if (!isNumber(yy)) return -5;
	if (!isNumber(mm)) {
	  var nn = mm.toLowerCase();
	  for (var i=1; i < 13; i++) {
			if (nn == mth[i] ||
   		nn == mth[i].substr(0,3)) {mm = i; i = 13;}
		}
	}
	if (!isNumber(mm)) return -6;
	dd = parseFloat(dd); 
	mm = parseFloat(mm); 
	yy = parseFloat(yy);
	if (yy < 100) yy += 2000;
	if (yy > today.getFullYear ()+60) yy-=100;//sliding window 60 future, 40 past
	if (yy < 1582 || yy > 4881) return -7;
	if (mm == 2 && (yy%400 == 0 || (yy%4 == 0 && yy%100 != 0))) day[mm-1]++;
	if (mm < 1 || mm > 12) return -8;
	if (dd < 1 || dd > day[mm-1]) return -9;
	t.setDate(dd); t.setMonth(mm-1); t.setFullYear(yy);
	if (rng == 'p' || rng == 'P') {
		if (t > today) return -10;
	}
	else if (rng == 'f' || rng == 'F') {
		if (t < today) return -11;
	}// else if (rng != 'a' && rng != 'A') return -12;
	return (yy*10000)+(mm*100)+dd;
}
function chkDts(f1,f2,alrt,js,verbose){
	/* f1 and f2 can be either the ids of 2 fields with expected m/d/y format and any day; or array of field id, fmt (UWJ), rng (PAF) -- see above
	alrt if 1/true or not supplied, this function will display alert and return true or false; 
			if 0/false, will if true return true or if false will error message to append to main error message
	js call to function if you need to do more with values
	Example calls: 
	chkDts(['FAQDateRange1',"U","P"],['FAQDateRange2',"U","P"],0,'PopHdnFaqDts(d1,d2)');
		this will check values of FAQDateRange1 and FAQDateRange2, 
		array format of args 1 & 2 dictates values to be mdy format for date in past and then 
		call PopHdnFaqDts with the d1 and d2 params (*numeric* yyyymmdd formatted date) being the created in validateDate.
	chkDts('FAQDateRange1','FAQDateRange2',1);
		this will check values of FAQDateRange1 and FAQDateRange2, expect m/d/yy format for any past or future dates,
		pop up alert if fail and
		return false
	verbose 1/true | 0/false[default] adds the reason for the rejection
	*/
	var o1=document.getElementById(typeof f1=="string"?f1:f1[0]);
	var o2=document.getElementById(typeof f2=="string"?f2:f2[0]);
	var ErMsg="";
	var d1="";
	var d2="";
	if(alrt==null || alrt!=false && alrt!=true && alrt !=1 && alrt!=0) alrt=true;
	if(verbose==null || verbose!=false && verbose!=true && verbose !=1 && verbose!=0) verbose=false;
	if(o1.value.length) d1=validateDate(o1.value, (typeof f1=="string")?"U" : f1[1], (typeof f1=="string")?"A" : f1[2]);
	if(o2.value.length) d2=validateDate(o2.value, (typeof f2=="string")?"U" : f2[1], (typeof f2=="string")?"A" : f2[2]);
	if(o1.value.length && d1<0) ErMsg+="\nYour first date, "+o1.value+", is not valid (required format: m/d/yyyy)"+(verbose?"\nNot accepted because: "+aryDateErrors[-d1-1] : "");
	if(o2.value.length && d2<0) ErMsg+="\nYour second date, "+o2.value+", is not valid (required format: m/d/yyyy)"+(verbose?"\nNot accepted because: "+aryDateErrors[-d2-1] : "");
	if(o1.value.length && o2.value.length && d1>"" && d2>"" && d2<d1) ErMsg+="\nThe two dates you have entered are in reverse order";
	if(ErMsg.length>0){
		if(alrt){
			alert("There is a problem with the dates you entered:"+ErMsg);
			return false;
		}else return ErMsg;
	}
	if(js!=null) eval(js);//doSomething(d1,d2)
	return true;
}