/* $Id: layout.js,v 1.2 2004/08/27 13:02:18 maxroeleveld Exp $ */

function getStyle ( theObject ) {
	return document.getElementById(theObject).style;
}
function swapImg( theId, theImg, theBg ) {
	var theDiv = getStyle( theId );
	theDiv.background = '#' + theBg + ' url(/images/header-bg-' + theImg + '.jpg)';
}
function changeTime( theTime ) {
	var times = new Array();
	times['mor'] = '9cf';
	times['day'] = '09f';
	times['eve'] = '930';
	times['nig'] = '036';
	swapImg( 'header', theTime, times[theTime] );
}

// ------- show / hide language

function toggleLang() {
	var langStyle = getStyle( 'languages' );
	var langVis = langStyle.visibility;
	
	if ( ( langVis == 'hidden' ) || ( langVis.length < 1 ) ) {
		langVis = 'visible';
	} else {
		langVis = 'hidden';
	}
	return false;
}


// -- fixHeader();
// changes the #header background according to time of day
// added oct 2006
function fixHeader(greetings) {
	var d = new Date();
	var h = d.getHours();
	var t = 0; //night
	
	if (h > 6) t = 1;  //morning
	if (h > 12) t = 2; //afternoon
	if (h > 18) t = 3; //evening
	if (h > 21) t = 0; //night
	var backgrounds = new Array('nite','morning','morning','nite');
	
	var img = backgrounds[t];
	var hd = document.getElementById('header');
	hd.style.backgroundImage = 'url(/images/headbg-'+img+'.gif)';
	if (greetings) {
		document.getElementById('greeting').innerHTML = greetings[t];	
	}
}



// ------- sleight
var onlyheader = false;

if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
		document.writeln('<style type="text/css">img { visibility: hidden; } </style>');
		window.attachEvent("onload", fnLoadPngs);
}

function fnLoadPngs() {
	var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
	var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);

	for (var i = document.images.length - 1, img = null; (img = document.images[i]); i--) {
		if (itsAllGood && img.src.match(/\.png$/i) != null) {
			fnFixPng(img);
			img.attachEvent("onpropertychange", fnPropertyChanged);
		}
		img.style.visibility = "visible";
	}

	var nl = document.getElementsByTagName("INPUT");
	for (var i = nl.length - 1, e = null; (e = nl[i]); i--) {
		if (e.className && e.className.match(/\bimage\b/i) != null) {
			if (e.src.match(/\.png$/i) != null) {
				fnFixPng(e);
				e.attachEvent("onpropertychange", fnPropertyChanged);
			}
			e.style.visibility = "visible";
		}
	}
}

function fnPropertyChanged() {
        if (window.event.propertyName == "src") {
                var el = window.event.srcElement;
                if (!el.src.match(/x\.gif$/i)) {
                        el.filters.item(0).src = el.src;
                        el.src = "x.gif";
                }
        }
}

function dbg(o) {
        var s = "";
        var i = 0;
        for (var p in o) {
                s += p + ": " + o[p] + "\n";
                if (++i % 10 == 0) {
                        alert(s);
                        s = "";
                }
        }
        alert(s);
}

function fnFixPng(img) {
        var src = img.src;
        img.style.width = img.width + "px";
        img.style.height = img.height + "px";
        img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')"
        img.src = "/images/spacer.gif";
}
// -------