var imgFolderPath = "http://www.uht-schuepbach.ch/site/fileadmin/zufalls-bilder/";
var headerImages = new Array();
var doArchiveCp = false;

function initPage() {
	getImages();
	checkRightCol();
	pickRandomImages();
	if( doArchiveCp ) archiveCp();
}

function getImages() {
	var checkNextImg = true;
	for( i = 0; checkNextImg; i++) {
		var tempImg = new Image();
		var imgNr = i + 1;
		if( imgNr < 10 ) imgNr = "0" + imgNr;
		tempImg.src = imgFolderPath + "bild" + imgNr + ".jpg";
		if( tempImg.height > 0 )
			headerImages[i] = tempImg;
		else
			checkNextImg = false;
	}
}

function pickRandomImages() {
	if( headerImages.length > 1 ) {
		var imgNrLefr = Math.floor( Math.random() * headerImages.length );
		var imgNrRight = Math.floor( Math.random() * headerImages.length );
		while( imgNrRight == imgNrLefr & headerImages.length > 1 ) imgNrRight = Math.floor( Math.random() * headerImages.length );
		document.getElementById( "td_header_img_left" ).style.backgroundImage = "url(" + headerImages[imgNrLefr].src + ")";
		document.getElementById( "td_header_img_right" ).style.backgroundImage = "url(" + headerImages[imgNrRight].src + ")";
	}
}

function checkRightCol() {
	var rightBox = document.getElementById( "div_main_content_right" );
	var rightBoxDivs =  rightBox.getElementsByTagName( "div" );
	var rightBoxContent;
	for( i = 0; i < rightBoxDivs.length; i++ )
		if( rightBoxDivs[i].className == "div_box_content" )
			rightBoxContent = rightBoxDivs[i];
	if( rightBoxContent.hasChildNodes() ) {
		var hasElementNodes = false;
		for( i = 0; i < rightBoxContent.childNodes.length; i++ ) {
			if( rightBoxContent.childNodes[i].nodeType == 1 )
				hasElementNodes = true;
		}
		if( !hasElementNodes ) hideRightCol();
	}
	else hideRightCol();
}
function hideRightCol() {
	var mainBox = document.getElementById( "div_main_content" );
	var mainBoxDivs = mainBox.getElementsByTagName( "div" );
	var leftBoxTop, leftBoxBottom;
	for( i = 0; i < mainBoxDivs.length; i++ ) {
		if( mainBoxDivs[i].className == "div_box_top" )
			leftBoxTop = mainBoxDivs[i];;
	}
	document.getElementById( "div_main_content_right" ).style.display = "none";
	mainBox.style.width = "722px";
	leftBoxTop.style.width = "722px";
}

function archiveCp() {
	var divTags = document.getElementsByTagName("div");
	var archiveDivTag;
	for( i = 0; i < divTags.length; i++ ) {
		if( divTags[i].className == "news-amenu-container" ) {
			archiveDivTag = divTags[i].cloneNode(true);
			divTags[i].style.display = "none";
		}
	}
	if( archiveDivTag ) {
		document.getElementById("div_news_archive_palce").appendChild(archiveDivTag);
	}
}