function blv_rollover(where) 
{
	switch (where) {
		case 'Unternehmenstheater': showImage(2);break;
		case 'Live-Kommunikation': showImage(3);break;
		case 'Mediathek': showImage(4);break;
		case 'Wir': showImage(5);break;
		default: showImage(1);break;
	}
}
function blv_rollout(where) 
{
	showImage(1);
}
function showImage(no) {
	if (document.getElementById('bigimage_1')!=null  && document.getElementById('bigimage_'+no)!=null) { 
	document.getElementById('bigimage_1').style.display = 'none';
	document.getElementById('bigimage_2').style.display = 'none';
	document.getElementById('bigimage_3').style.display = 'none';
	document.getElementById('bigimage_4').style.display = 'none';
	document.getElementById('bigimage_5').style.display = 'none';
	document.getElementById('bigimage_'+no).style.display = 'block';
	} 
}

function initInfobox() {
	window.addEvent('domready', function() {
	var status = {
		'true': 'open',
		'false': 'close'
	};
	var infobox_content = new Fx.Slide('infobox_content');

	//fuege oeffnen funktion auf togglebutton hinzu
	$('infobox_toggle').addEvent('click', function(){
//		e.stop();
		infobox_content.toggle();
		if (infobox_content.open) {$('infobox_toggle').innerHTML='>>'}
		else {$('infobox_toggle').innerHTML='<<'}
	});
//	infobox_content.toggle();
	infobox_content.addEvent('complete', function(){

		});
	});
	
}

function showInfobox() {

}


function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
{
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5) && (document.body.filters)) 
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i]
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
            var imgID = (img.id) ? "id='" + img.id + "' " : ""
            var imgClass = (img.className) ? "class='" + img.className + "' " : ""
            var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
            var imgStyle = "display:inline-block;" + img.style.cssText 
            if (img.align == "left") imgStyle = "float:left;" + imgStyle
            if (img.align == "right") imgStyle = "float:right;" + imgStyle
            if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }    
}

if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
window.attachEvent("onload", correctPNG);
}