// adapted from: http://www.quirksmode.org/js/croswin.html

	var minicalwin = null;
	function openminical (r,e)
	{
		// set the year-month, and form and field names for the calendar to set values into
		var d = document[r][e+'[y]'].value + document[r][e+'[m]'].value;
//		var url = "/minical.php?d="+d+"&r="+r+"&e="+e;
		var url = "/minical/"+d+"/"+r+"/"+e;

		// open window, unless already open, then just change url
		if (minicalwin && !minicalwin.closed) { minicalwin.location.href = url; }
		else { minicalwin = window.open(url, "_blank",
		 "height=200,width=300,resizable=0,scrollbars=0,toolbar=0,location=0,status=0,menubar=0,directories=0,copyhistory=0");
		 if (!minicalwin.opener) { minicalwin.opener = self; } }  // force popup to be able to access this window

		if (window.focus) { minicalwin.focus(); }  // make sure to focus on pop up!
	}






// these allow us to process a text field as a date instead of using separate dropdowns


	function zero_pad (i) { n = i.toString(); return (n.length < 2 ? '0'+n : n); }

	function setdateymd (e,y,m,d)
	{
		// turn on/off range checking easily
		var j = 0, n = 0;
		if (true)
		{
			// do range checking -- if it starts w/ a zero, it will be considered octal!
			y = parseInt(y); n = m = parseInt(m,10); j = d = parseInt(d,10);
			if (y < 1111 || y > 9999) { e.focus(); alert('Year is out of range!'); return false; }
			if (m < 1 || m > 12) { e.focus(); alert('Month is out of range!'); return false; } else { m = zero_pad(m); }
			if (d < 1 || d > 31) { e.focus(); alert('Day is out of range!'); return false; } else { d = zero_pad(d); }
		}

		// fill in the hidden fields / dropdowns with the parsed values
		r = e.form; e = e.name.slice(0,-3);
		r[e+'[y]'].value = y.toString(); r[e+'[m]'].value = m; r[e+'[d]'].value = d;
		r[e+'[a]'].value = n + '/' + j + '/' + y.toString();
		return true;
	}


	var months = ['unk','jan','feb','mar','apr','may','jun','jul','aug','sep','oct','nov','dec'];
	function monthnamenum (n0) { var n = n0.toLowerCase();
	 for (i in months) { if (months[i] == n) { return i; } } return 0; }


	var re_mdy = /^(\d{1,2})\D+(\d{1,2})\D+(\d{4})$/i;
	var re_ymd = /^(\d{4})\D*(\d{1,2})\D*(\d{1,2})$/i;
	var re_text = /^([a-z]{3})[a-z]*\W*(\d{1,2})\D*(\d{4})$/i;

	function checkdatetext (e)
	{
		if (e.value == '') { return true; }
		var r = null;
		if (r = re_mdy.exec(e.value)) { return setdateymd(e,r[3],r[1],r[2]); }
		if (r = re_ymd.exec(e.value)) { return setdateymd(e,r[1],r[2],r[3]); }
		if (r = re_text.exec(e.value)) { return setdateymd(e,r[3],monthnamenum(r[1]),r[2]); }
		e.focus(); alert('You must input a valid date format: m/d/Y, or Y-m-d, or Mon[th] d, Y');
		return false;
	}





	function settimehi (e,h,i,m)
	{
		// turn on/off range checking easily
		var g = 0;
		if (true)
		{
			// do range checking -- if it starts w/ a zero, it will be considered octal!
			g = h = parseInt(h); i = parseInt(i,10); m = (m ? m.substr(0,1).toLowerCase() : '');
			if (m != '' && m != 'a' && m != 'p') { e.focus(); alert('AM/PM is out of range!'); return false; }
			if (m == 'a' && h > 12) { e.focus(); alert('Hours is out of range!'); return false; }  // AM must match!
			if (m == 'p' && h < 12) { h += 12; }  // shift into 24 hour clock
			if (m == '' && h > 12) { g -= 12; m = 'p'; } else { m = 'a'; } // shift into 12 hour clock for display
			if (h < 0 || h > 23) { e.focus(); alert('Hours is out of range!'); return false; } else { h = zero_pad(h); }
			if (i < 0 || i > 59) { e.focus(); alert('Minutes is out of range!'); return false; } else { i = zero_pad(i); }
		}

		// fill in the hidden fields / dropdowns with the parsed values
		r = e.form; e = e.name.slice(0,-3);
		r[e+'[hi]'].value = h + ':' +i;
		r[e+'[t]'].value = g + ':' + i + (m ? ' ' + m + 'm' : '');
	}



	var re_time = /^\D*(\d{1,2})\D*(\d{2})\W*([ap]m?)?\D*$/i;

	function checktimetext (e)
	{
		var r = null;
		if (r = re_time.exec(e.value)) { return settimehi(e,r[1],r[2],r[3]); }
		e.focus(); alert('You must input a valid time format: h:i, or g:i [a|p]m');
		return false;
	}






function showhelpswap (e)
{
	var s = document.getElementById('showhelp_'+e.name).style;
	s.display = (s.display == 'block' ? 'none' : 'block');
}

function showhelpshow (e)
 { document.getElementById('showhelp_'+e.name).style.display = 'block'; }

function showhelphide (e)
 { document.getElementById('showhelp_'+e.name).style.display = 'none'; }