////////////////////////////////////////////////////////////////////////////

/// Tijd/kalender functies/vars ////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////

maanden	= new Array(0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

maand	= new Array("januari", "februari", "maart", "april", "mei", "juni", "juli", "augustus", "september", "oktober", "november", "december");

dagen	= new Array("zondag", "maandag", "dinsdag", "woensdag", "donderdag", "vrijdag", "zaterdag");

kalenderWindow	= 0;



// bepaal hoeveel seconden sinds 01-01-1970 tot aan arg-datum

function maakEpoch(arg) {

	var ta	= new Array();

	ta	= arg.split('-');

	return Date.UTC(ta[2], ta[1]-1, ta[0], 5, 5, 5);

}



// bepaal aan de hand van epoch-seconden welke week-dag een bepaalde datum is

function bepaalDag(arg) {

	d	= new Date(maakEpoch(arg));

	return d.getDay()+1;

}



// bepaal datum van vandaag

function bepaalHuidigeDatum() {

	d	= new Date();

	return d.getDate() + "-" + (d.getMonth()+1) + "-" + d.getYear();

}



// bepaal vorige en volgende maand aan de hand van een meegegeven datum

function nextPrev(arg1 , arg2) {

	var ta		= new Array();

	ta		= arg1.split('-');



	for (i=0; i<=3; i++) ta[i] = makeInt(ta[i])



	if	(arg2 == "min"	&& ta[1] > 1)	tvar	= ta[0] + "-"    + (ta[1]-1) + "-" + ta[2]

	else if (arg2 == "min")			tvar	= ta[0] + "-12-" + (ta[2]-1)

	else if	(arg2 == "plus"	&& ta[1] < 12)	tvar	= ta[0] + "-"    + (ta[1]+1) + "-" + ta[2]

	else if (arg2 == "plus")		tvar	= ta[0] + "-1-"  + (ta[2]+1)

	return tvar;

}



// zodra waarde van één der dropdowns verandert, maak nieuwe kalender

function formChange() {

	t1 = document.kalenderForm.kalDag.value;

	t2 = document.kalenderForm.kalMaand.value;

	t3 = document.kalenderForm.kalJaar.value;



	if	(t1%400 == 0)	maanden[2] = 29;

	else if (t1%4   == 0)	maanden[2] = 29;

	else			maanden[2] = 28;



	if (t1 > maanden[t2])	t1 = maanden[t2]



	maakKalender(t1+"-"+t2+"-"+t3);

}



// bouw nieuwe kalender aan de hand van meegegeven datum, anders datum van vandaag

function maakKalender(arg) {

	arg		= arg ? arg:bepaalHuidigeDatum();



	tmin		= nextPrev(arg, "min");

	tplus		= nextPrev(arg, "plus");



	var kalender	= "";

	var ta		= new Array();

	ta		= arg.split('-');



	for (i=0; i<=3; i++)		ta[i] = makeInt(ta[i])



	if (ta[0] > maanden[ta[1]])	ta[0] = maanden[ta[1]]



	arg		= "1-" + ta[1] + "-" + ta[2];

	var dag		= bepaalDag(arg);



	// bepaal aantal dagen in februari, afhankelijk van schrikkeljaar

	if	(ta[2]%100==0 && ta[2]%400==0)	maanden[2] = 29;

	else if (ta[2]%4 == 0)			maanden[2] = 29;

	else					maanden[2] = 28;



	// print kalender-header met vorige/volgende-knoppen, maand-naam en jaartal

	kalender += "<table border=0 width=140 cellspacing=0 cellpadding=0 bordercolor='#666666'\"><tr><td>";

	kalender += "<table width=140 bgcolor='#d4d0c8' style='font-family: arial; font-size: 10px' cellpadding=0 cellspacing=0>";

	kalender += "<tr bgcolor='#d4d0c8'> <td> &nbsp; <a style='text-decoration: none' onclick='maakKalender(\"" + tmin + "\"); void(0)'>&lt;&lt;</a> </td>";

	kalender += "<td colspan=5 align=center>" + maand[ta[1]-1] + " " + ta[2] + "</td>";

	kalender += "<td align=right> <a style='text-decoration: none' onclick='maakKalender(\"" + tplus + "\"); void(0)'>&gt;&gt;</a> &nbsp; </td> </tr>";

	kalender += "<tr bgcolor='#d4d0c8'\">";



	// print eerste 2 letters van de namen van de week-dagen

	for (i=0; i<=6; i++)	kalender += "<td align=center>" + dagen[i].substring(0,2) + "</td>"

	kalender += "</tr>"



	// print alle dagen van de maand in de cell van de bijbehorende dag

	for (i=1; i<=42; i++) {

		if (i==parseInt(ta[0])+dag-1)	tempColor = "red"

		else				tempColor = "#DDDDDD"



		if ((i-1)%7 == 0)	kalender += "<tr bgcolor='#DDDDDD'>"



		tempDat		= (i-dag+1) + "-" + ta[1] + "-" + ta[2];

		tempDat2	= dagen[bepaalDag(tempDat)-1] + " " + (i-dag+1) + " " + maand[ta[1]] + " " + tempDat;



		if (i>=dag && i-dag+1<=maanden[ta[1]])	kalender += "<td width=20 align=center bgcolor='" + tempColor + "' onMouseDown=\"maakKalender('" + tempDat + "')\" title='" + tempDat2 + "'>" + (i-dag+1) + "</td>"

		else					kalender += "<td>&nbsp;</td>"



		if (i%7 == 0)	kalender += "</tr>"

	}



	// print dropDowns voor dagen, maanden en jaren

	kalender += "<tr bgcolor='#d4d0c8'><td colspan=7 align=center>";



	kalender += "<select name=kalDag style='font-family: arial; font-size: 10px' onChange='formChange()'\">"

	for (i=1; i<=31; i++) kalender += "<option value='" +i+ "'style='color: #000000' " +((i==ta[0])?"selected":"")+ ">" + i

	kalender += "</select>"



	kalender += "<select name=kalMaand style='font-family: arial; font-size: 10px' onChange='formChange()'\">"

	for (i=1; i<=12; i++) kalender += "<option value='" +i+ "'style='color: #000000' " +((i==ta[1])?"selected":"")+ ">" + i

	kalender += "</select>"



	kalender += "<select name=kalJaar style='font-family: arial; font-size: 10px' onChange='formChange()'\">"

	for (i=ta[2]-10; i<=ta[2]+10; i++) kalender += "<option value='" +i+ "'style='color: #000000' " +((i==ta[2])?"selected":"")+ ">" + i

	kalender += "</select><br>"



	// print kalender-footer met drie links naar de volgende functies: vandaag, cancel en klaar

	kalender += "<a href='javascript:maakKalender(bepaalHuidigeDatum()); void(0)'>vandaag</a> | ";

	kalender += "<a href='javascript:closeKalender(); void(0)'>cancel</a> | ";

	kalender += "<a href='javascript:passVars(); void(0)'>klaar</a>";

	kalender += "</td></tr></table></td></tr></table>";



	document.all["kalender"].innerHTML		= kalender;

}



////////////////////////////////////////////////////////////////////////////

/// Window functies ////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////

function returnFalse()		{return false}

function closeKalender()	{window.close()}

function passVars()		{window.opener.handleDate(document.kalenderForm.kalDag.value +"-"+ document.kalenderForm.kalMaand.value +"-"+ document.kalenderForm.kalJaar.value)}



function openKalenderWindow(arg1 , arg2) {
	formName	= arg1;



	velden		= new Array();

	velden		= arg2.split('-');



//	eval("tDag	= makeInt(document."+formName+"."+velden[0]+".value)");

//	eval("tMaand	= makeInt(document."+formName+"."+velden[1]+".value)");

//	eval("tJaar	= makeInt(document."+formName+"."+velden[2]+".value)");




	eval("tDag	= makeInt(document."+formName+"."+velden[0]+".value)");

	eval("tMaand	= makeInt(document."+formName+"."+velden[1]+".value)");

	eval("tJaar	= makeInt(document."+formName+"."+velden[2]+".value)");





	d		= new Date();

	tDag		= (isNaN(tDag)		|| tDag<1	|| tDag>31	) ? d.getDate()		:tDag;

	tMaand		= (isNaN(tMaand)	|| tMaand<1	|| tMaand>12	) ? d.getMonth()+1	:tMaand;

	tJaar		= (isNaN(tJaar)		|| tJaar<1900	|| tJaar>2100	) ? d.getYear()		:tJaar;

	kalenderDatum	= tDag+"-"+tMaand+"-"+tJaar;



	kalenderWindow	= window.open("/kalender/kalenderPopUp.htm" , "kalenderPop", "top="+ (screen.availHeight-135)/2 +", left="+ (screen.availWidth-135)/2 +", resizable=no, scrollbars=no, width=135, height=135");

	kalenderWindow.focus();

}



function handleDate(arg) {

	kalenderWindow.close();



	var ta	= new Array();

	ta	= arg.split('-');



	eval("document."+formName+"."+velden[0]+".value	= "+ta[0]);

	eval("document."+formName+"."+velden[1]+".value	= "+ta[1]);

	eval("document."+formName+"."+velden[2]+".value	= "+ta[2]);

}



////////////////////////////////////////////////////////////////////////////

/// Print wat dingen ///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////

/// Print invulvelden voor hoofdpagina

function printDrops(arg1 , arg2 , arg3 , arg4) {

	document.onmousemove	= focusOnKalender;

	onunload		= closeKalender2;


	if	(arg4 == null)	arg4 = bepaalHuidigeDatum()

	else if	(arg4 == "")	arg4 = "--"



	var ta		= new Array();

	var velden	= new Array();

	ta		= arg4.split('-');

	velden		= arg2.split('-');


	if 	(arg4 != "--") {

		for (i=0; i<3; i++)		ta[i] = makeInt(ta[i])


		d	= new Date();

		ta[0]	= (!ta[0] || isNaN(ta[0]) || ta[0]<1	|| ta[0]>31)	? d.getDate()		:ta[0];

		ta[1]	= (!ta[1] || isNaN(ta[1]) || ta[1]<1	|| ta[1]>12)	? d.getMonth()+1	:ta[1];

		ta[2]	= (!ta[2] || isNaN(ta[2]) || ta[2]<1900	|| ta[2]>2100)	? d.getYear()		:ta[2];

	}





	if (!bw.mac) {

		kalender  = "<input onblur='checkDate(1,31)'		type=text name="+velden[0]+" value='"+ta[0]+"' size=1 maxlength=2 "+arg3+" align=middle>&nbsp;";

		kalender += "<input onblur='checkDate(1,12)'		type=text name="+velden[1]+" value='"+ta[1]+"' size=2 maxlength=2 "+arg3+" align=middle>&nbsp;";

		kalender += "<input onblur='checkDate(1970,2030)'	type=text name="+velden[2]+" value='"+ta[2]+"' size=4 maxlength=4 "+arg3+" align=middle>&nbsp;";

		kalender += "<img src='/kalender/kalender.gif' alt='Open kalender' align=middle onClick=\"openKalenderWindow('"+arg1+"' , '"+arg2+"'); void(0)\">"

	}

	else {

		kalender	= "<select name=" + velden[0] + " style='width: 50'>";

		kalender 	+= "<option value=''>";

		for (var i=1; i<=31; i++) kalender  += "<option " + (ta[0] && i==ta[0] ? "selected":"") + " value=" + i + ">" + i;

		kalender	+= "</select>";



		kalender	+= "<select name=" + velden[1] + " style='width: 50'>";

		kalender 	+= "<option value=''>";

		for (var i=1; i<=12; i++) kalender  += "<option " + (ta[1] && i==ta[1] ? "selected":"") + " value=" + i + ">" + i;

		kalender  += "</select>";



		kalender	+= "<select name=" + velden[2] + " style='width: 50'>";

		kalender 	+= "<option value=''>";

		for (var i=1900; i<=2020; i++) kalender  += "<option " + (ta[2] && i==ta[2] ? "selected":"") + " value=" + i + ">" + i;

		kalender  += "</select>";

	}



	document.write(kalender);

}



/// Print kalender in pop-up

function printKalender(){

	if (document.layers)	window.captureEvents(Event.MOUSEDOWN);

	window.onmousedown	=returnFalse;

	document.onkeydown	= returnFalse;

	document.onselectstart	= returnFalse;

	document.oncontextmenu	= returnFalse;

	document.ondragstart	= returnFalse;



	document.write("<form name=kalenderForm><div id='kalender' style='position:absolute; left:0; top:0'>.</div></form>");

	maakKalender(window.opener.kalenderDatum);

}



function focusOnKalender() {

	if (kalenderWindow && kalenderWindow.open && !kalenderWindow.closed) kalenderWindow.focus()

}



function closeKalender2() {

	if (kalenderWindow && kalenderWindow.open && !kalenderWindow.closed) kalenderWindow.close()

}



// Checkt de inhoud van de velden igv 'onblur', een min. en een max. waarde worden meegegeven

function checkDate(arg1 , arg2) {

	var src	= window.event.srcElement;

	var tmp = src.value.replace(/^0/ig, '');

	tmp = makeInt(src.value.replace(/\D/ig, ''));

	if (src.value!='' && (isNaN(tmp) || tmp<arg1 || tmp>arg2)) {

		if (confirm('Geef een getalswaarde tussen de '+arg1+' en '+arg2+'\nWilt u dit veld wissen?'))	src.value = ''

		src.focus();

		src.select();

	}

	else if (isNaN(tmp))	{src.value = ''}

	else			{src.value = tmp}

}

function makeInt(a) {
	return a ? parseInt(a.replace(/^0+/ , '')):''
}



////////////////////////////////////////////////////////////////////////////

/// Einde script ///////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////