/*
	Copyright (C) 2003-2007 UseBB Team
	http://www.usebb.net
	
	$Header: /cvsroot/usebb/UseBB/sources/javascript.js,v 1.16 2007/01/01 11:58:48 pc_freak Exp $
	
	This file is part of UseBB.
	
	UseBB is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
	
	UseBB is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
	GNU General Public License for more details.
	
	You should have received a copy of the GNU General Public License
	along with UseBB; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * Some browser detection
 */
var clientPC	= navigator.userAgent.toLowerCase(); // Get client info
var is_gecko	= ((clientPC.indexOf('gecko')!=-1) && (clientPC.indexOf('spoofer')==-1)
								&& (clientPC.indexOf('khtml') == -1) && (clientPC.indexOf('netscape/7.0')==-1));
var is_safari = ((clientPC.indexOf('AppleWebKit')!=-1) && (clientPC.indexOf('spoofer')==-1));
var is_khtml = (navigator.vendor == 'KDE' || ( document.childNodes && !document.all && !navigator.taintEnabled ));
if (clientPC.indexOf('opera')!=-1) {
	var is_opera = true;
	var is_opera_preseven = (window.opera && !document.childNodes);
	var is_opera_seven = (window.opera && document.childNodes);
}

/**
 * apply tagOpen/tagClose to selection in textarea, use sampleText instead
 * of selection if there is none copied and adapted from phpBB
 *
 * @author phpBB development team
 * @author MediaWiki development team
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Jim Raynor <jim_raynor@web.de>
 */
function insert_tags(tagOpen, tagClose) {
	var txtarea = document.getElementById('tags-txtarea');
	var sampleText = '';
	// IE
	if(document.selection	&& !is_gecko) {
		var theSelection = document.selection.createRange().text;
		var replaced = true;
		if(!theSelection){
			replaced = false;
			theSelection=sampleText;
		}
		txtarea.focus();
 
		// This has change
		text = theSelection;
		if(theSelection.charAt(theSelection.length - 1) == " "){// exclude ending space char, if any
			theSelection = theSelection.substring(0, theSelection.length - 1);
			r = document.selection.createRange();
			r.text = tagOpen + theSelection + tagClose + " ";
		} else {
			r = document.selection.createRange();
			r.text = tagOpen + theSelection + tagClose;
		}
		if(!replaced){
			r.moveStart('character',-text.length-tagClose.length);
			r.moveEnd('character',-tagClose.length);
		}
		r.select();
	// Mozilla
	} else if(txtarea.selectionStart || txtarea.selectionStart == '0') {
		var replaced = false;
		var startPos = txtarea.selectionStart;
		var endPos	 = txtarea.selectionEnd;
		if(endPos - startPos) replaced = true;
		var scrollTop=txtarea.scrollTop;
		var myText = (txtarea.value).substring(startPos, endPos);
		if(!myText) { myText=sampleText;}
		if(myText.charAt(myText.length - 1) == " "){ // exclude ending space char, if any
			subst = tagOpen + myText.substring(0, (myText.length - 1)) + tagClose + " ";
		} else {
			subst = tagOpen + myText + tagClose;
		}
		txtarea.value = txtarea.value.substring(0, startPos) + subst + txtarea.value.substring(endPos, txtarea.value.length);
		txtarea.focus();
 
		//set new selection
		if(replaced){
			var cPos=startPos+(tagOpen.length+myText.length+tagClose.length);
			txtarea.selectionStart=cPos;
			txtarea.selectionEnd=cPos;
		}else{
			txtarea.selectionStart=startPos+tagOpen.length;	 
			txtarea.selectionEnd=startPos+tagOpen.length+myText.length;
		}
		txtarea.scrollTop=scrollTop;
	// All others
	} else {
		var copy_alertText=alertText;
		var re1=new RegExp("\\$1","g");
		var re2=new RegExp("\\$2","g");
		copy_alertText=copy_alertText.replace(re1,sampleText);
		copy_alertText=copy_alertText.replace(re2,tagOpen+sampleText+tagClose);
		var text;
		if (sampleText) {
			text=prompt(copy_alertText);
		} else {
			text="";
		}
		if(!text) { text=sampleText;}
		text=tagOpen+text+tagClose;
		//append to the end
		txtarea.value += "\n"+text;

		// in Safari this causes scrolling
		if(!is_safari) {
			txtarea.focus();
		}

	}
	// reposition cursor if possible
	if (txtarea.createTextRange) txtarea.caretPos = document.selection.createRange().duplicate();
}

//
// Shortcut for smiley adding code
//
function insert_smiley(code) {
	
	insert_tags(' '+code+' ', '');
	
}

//
// Set focus to input field
//
function set_focus(field_id) {
	
	document.getElementById(field_id).focus();
	
}

//
// Insert database table name
//
function insert_table(name) {
	
	insert_tags(name, '');
	
}

//
// Toggle ACP general configuration panels
//
function acp_config_toggle(panel) {
	
	var panels = document.getElementsByTagName('div');
	
	for ( var i = 0; i < panels.length; i++ ) {
		
		if ( panels[i].className == 'adminconfigtablecell' )
			panels[i].style.display = 'none';
		
	}
	
	if ( panel != null )
		document.getElementById(panel).style.display = 'block';
	
}

//
// Standards compliant external windows
//
function init_external() {
	
	if ( !document.getElementsByTagName )
		return;
	
	var anchors = document.getElementsByTagName('a');
	for ( var i = 0; i < anchors.length; i++ ) {
		
		var anchor = anchors[i];
		if ( anchor.href && anchor.rel && (' '+anchor.rel+' ').indexOf(' external ') != -1 )
			anchor.target = '_blank';
		
	}
	
}




/* kdate.js - Kaluach Javascript Hebrew date routines
 *   Version 0.03 (beta release)
 * Copyright (C) 5760 (2000 CE), by Abu Mami and Yisrael Hersch.
 *   All Rights Reserved.
 *   All copyright notices in this script must be left intact.
 * Based on the formula by Gauss
 * Terms of use:
 *   - Permission will be granted to use this script on personal
 *     web pages. All that's required is that you please ask.
 *     (Of course if you want to send a few dollars, that's OK too :-)
 *   - Use on commercial web sites requires a $50 payment.
 * website: http://www.kaluach.net
 * email: abu-mami@kaluach.net
 */

function makeArray() {
	this[0] = makeArray.arguments.length;
	for (i = 0; i < makeArray.arguments.length; i = i + 1)
		this[i+1] = makeArray.arguments[i];
}

var hebMonth = new makeArray(
	'NISZÁN', 'IJÁR', 'SZIVÁN', 'TAMMUZ', 'ÁV', 'ELUL',
	'TÍSRI', 'CHESVÁN', 'KISZLÉV', 'TÉVÉT', 'SEVÁT',
	'ÁDÁR', 'ÁDÁR I', 'ÁDÁR II');

var civMonth = new makeArray(
	'JANUÁR', 'FEBRUÁR', 'MÁRCIUS', 'ÁPRILIS', 'MÁJUS', 'JÚNIUS',
	'JÚLIUS', 'AUGUSZTUS', 'SZEPTEMBER', 'OKTÓBER', 'NOVEMBER', 'DECEMBER');

var weekDay = new makeArray(
	'Sun', 'Mon', 'Tues', 'Wed', 'Thur', 'Fri', 'Shabbat');

function Gauss(year) {
	var a,b,c;
	var m;
	var	Mar;	// "day in March" on which Pesach falls (return value)

	a = Math.floor((12 * year + 17) % 19);
	b = Math.floor(year % 4);
	m = 32.044093161144 + 1.5542417966212 * a +  b / 4.0 - 0.0031777940220923 * year;
	if (m < 0)
		m -= 1;
	Mar = Math.floor(m);
	if (m < 0)
		m++;
	m -= Mar;

	c = Math.floor((Mar + 3 * year + 5 * b + 5) % 7);
	if(c == 0 && a > 11 && m >= 0.89772376543210 )
		Mar++;
	else if(c == 1 && a > 6 && m >= 0.63287037037037)
		Mar += 2;
	else if(c == 2 || c == 4 || c == 6)
		Mar++;

	Mar += Math.floor((year - 3760) / 100) - Math.floor((year - 3760) / 400) - 2;
	return Mar;
}

function leap(y) {
	return ((y % 400 == 0) || (y % 100 != 0 && y % 4 == 0));
}

function civMonthLength(month, year) {
	if(month == 2)
		return 28 + leap(year);
	else if(month == 4 || month == 6 || month == 9 || month == 11)
	   return 30;
	else
		return 31;
}

function civ2heb(day, month, year) {
	var d = day;
	var	m = month;
	var y = year;
	var hy;
	var pesach;
	var anchor;
	var adarType;

	m -= 2;
	if (m <= 0) { // Jan or Feb
		m += 12;
		y -= 1;
	}

	d += Math.floor(7 * m / 12 + 30 * (m - 1)); // day in March
	hy = y + 3760;	// get Hebrew year
	pesach = Gauss(hy);
	if (d <= pesach - 15) { // before 1 Nisan
		anchor = pesach;
		d += 365;
		if(leap(y))
			d++;
		y -= 1;
		hy -= 1;
		pesach = Gauss(hy);
	}
	else
		anchor = Gauss(hy + 1);

	d -= pesach - 15;
	anchor -= pesach - 12;
	y++;
	if(leap(y))
		anchor++;

	for(m = 0; m < 11; m++) {
		var days;
		if(m == 7 && anchor % 30 == 2)
			days = 30; // Cheshvan
		else if(m == 8 && anchor % 30 == 0)
			days = 29; // Kislev
		else
			days = 30 - m % 2;
		if(d <= days)
			break;
		d -= days;
	}

	adarType = 0;			// plain old Adar
	if (m == 11 && anchor >= 30) {
		if (d > 30) {
			adarType = 2;	// Adar 2
			d -= 30;
		}
		else
			adarType = 1;	// Adar 1
	}

	if(m >= 6)		// Tishrei or after?
		hy++;		// then bump up year

	if(m == 11)			// Adar?
		m += adarType;	// adjust for Adars

	return (d + ' ' + m + ' ' + hy);
}


function Easter(Y) {
	// based on the algorithm of Oudin
    var C = Math.floor(Y / 100);
    var N = Y - 19 * Math.floor(Y / 19);
    var K = Math.floor((C - 17) / 25);
    var I = C - Math.floor(C / 4) - Math.floor((C - K) / 3) + 19 * N + 15;
    I = I - 30*Math.floor((I / 30));
    I = I - Math.floor(I / 28) * (1 - Math.floor(I / 28) * Math.floor(29 / (I + 1)) * Math.floor((21 - N) / 11));
    var J = Y + Math.floor(Y / 4) + I + 2 - C + Math.floor(C / 4);
    J = J - 7 * Math.floor(J / 7);
    var L = I - J;
    var M = 3 + Math.floor((L + 40) / 44);
    var D = L + 28 - 31 * Math.floor(M / 4);

	var ret = new Object();
	ret[1] = M;
	ret[2] = D;
	return ret;
}

function DOW(day,month,year) {
	var a = Math.floor((14 - month)/12);
	var y = year - a;
	var m = month + 12*a - 2;
	var d = (day + y + Math.floor(y/4) - Math.floor(y/100) +
			Math.floor(y/400) + Math.floor((31*m)/12)) % 7;
	return d + 1;
}

function NthDOW(nth,weekday,month,year) {
	if (nth > 0)
		return (nth - 1) * 7 + 1 + (7 + weekday - DOW((nth - 1) * 7 + 1, month, year)) % 7;
	var days = civMonthLength(month, year);
	return days - (DOW(days, month, year) - weekday + 7) % 7;
}

function holidays(cday, cmonth, cyear) {
	// American civil holidays and some major religious holiday
	if (cmonth == 1 && cday == 1)
		return "New Year's Day";
	else if (cmonth == 2 && cday == 12)
		return "Lincoln's Birthday";
	else if (cmonth == 2 && cday == 14)
		return "Valentine's Day";
	else if (cmonth == 2 && cday == NthDOW(3, 2, 2, cyear))
		return "President's Day";
	else if (cmonth == 3 && cday == 17)
		return "St. Patrick's Day";
	else if (cmonth == 3 || cmonth == 4) {
		var e = Easter(cyear);
	    if (cmonth == e[1] && cday == e[2])
			return "Easter";
	}
	else if (cmonth == 5 && cday == NthDOW(2, 1, 5, cyear))
		return "Mother's Day";
	else if (cmonth == 5 && cday == NthDOW(3, 7, 5, cyear))
		return "Armed Forces Day";
	else if (cmonth == 5 && cday == NthDOW(0, 2, 5, cyear))
		return "Memorial Day";
	else if (cmonth == 6 && cday == 14)
		return "Flag Day";
	else if (cmonth == 6 && cday == NthDOW(3, 1, 6, cyear))
		return "Father's Day";
	else if (cmonth == 7 && cday == 4)
		return "Independence Day";
	else if (cmonth == 9 && cday == NthDOW(1, 2, 9, cyear))
		return "Labor Day";
	else if (cmonth == 10 && cday == NthDOW(2, 2, 10, cyear))
		return "Columbus Day";
	else if (cmonth == 10 && cday == 31)
		return "Halloween";
	else if (cmonth == 11 && cday == 11)
		return "Veterans' Day";
	else if (cmonth == 11 && cday == NthDOW(4, 5, 11, cyear))
		return "Thanksgiving";
	else if (cmonth == 12 && cday == 25)
		return "Christmas";

	return "";
}

function moadim(cday, cmonth, cyear, hday, hmonth, dow) {
	if(hmonth == 6) {
		if(hday == 1 || hday == 2)
			return "Rosh Hashana"
		else if(hday == 3 && dow != 7)
			return "Fast of Gedalia";
		else if(hday == 4 && dow == 1)
			return "Fast of Gedalia";
		else if(hday == 10)
			return "Yom Kippur"
		else if(hday >= 15 && hday <= 22)
			return "Sukkot"
		else if(hday == 23)
			return "Sukkot (d)"
	}
	else if(hmonth == 8) {
		if(hday >= 25)
			return "Chanukkah"
	}
	else if(hmonth == 9) {
		if(hday <= 2) {
			return "Chanukkah"
		}
		else if(hday == 3) {
			// Kislev can be malei or chaser
			if(cday == 1) {
				cday = 29;
				cmonth = 11;
			}
			else if(cday == 2) {
				cday = 30;
				cmonth = 11;
			}
			else
				cday -= 3;
			var hdate = civ2heb(cday, cmonth, cyear);
			hd = eval(hdate.substring(0, hdate.indexOf(' ')));
			if(hd == 29)
				return "Chanukkah"
		}
		else if(hday == 10)
			return "Fast of Tevet"
	}
	else if(hmonth == 10) {
		if(hday==15)
			return "Tu b'Shvat"
	}
	else if(hmonth == 11 || hmonth == 13) {
		if(hday == 11 && dow == 5)
			return "Taanit Esther"
		else if(hday == 13 && dow != 7)
			return "Taanit Esther"
		else if(hday == 14)
			return "Purim"
		else if(hday == 15)
			return "Shushan Purim"
	}
	else if(hmonth == 0) {

		if(hday == 12 && dow == 5)
			return "Taanit Bechorot"
		else if(hday == 14 && dow != 7)
			return "Taanit Bechorot"
		else if(hday >= 15 && hday <= 21)
			return "Pesach"
		else if(hday == 22)
			return "Pesach (d)"
	}
	else if(hmonth == 1) {
		if(hday == 3 && dow == 5)
			return "Yom Ha'Atzmaut"
		else if(hday == 4 && dow == 5)
			return "Yom Ha'Atzmaut"
		else if(hday == 5 && dow != 6 && dow != 7)
			return "Yom Ha'Atzmaut"
		if(hday == 14)
			return "Pesah sheni"
		else if(hday == 18)
			return "Lag B'Omer"
		if(hday == 28)
			return "Yom Yerushalayim"
	}
	else if(hmonth == 2) {
		if(hday == 6)
			return "Shavuot"
		else if(hday == 7)
			return "Shavuot (d)"
	}
	else if(hmonth == 3) {
		if(hday == 17 && dow != 7)
			return "Fast of Tammuz"
		if(hday == 18 && dow == 1)
			return "Fast of Tammuz"
	}
	else if(hmonth == 4) {
		if(hday == 9 && dow != 7)
			return "Tisha B'Av"
		if(hday == 10 && dow == 1)
			return "Tisha B'Av"
		if(hday == 15)
			return "Tu B'Av"
	}

	return "";
}