function make_opak(IMG_ID)
{
	document.getElementById(IMG_ID+'_img').className='opak';
}

function make_trans(IMG_ID)
{
	document.getElementById(IMG_ID+'_img').className='transparent';
}

function make_all_trans(IMG_ID)
{	
	var imgs = document.getElementsByTagName("img"); // LIEST ALLE DIVS IN EIN ARRAY

	for ( var i = 0; i < imgs.length; ++i ) // DURCHLAEUFT ALLE DIVS
	{
		if (!imgs[i].id)
			continue;
		var imgId = imgs[i].id;
		var thisIMG = IMG_ID+'_img';
		if (imgId != thisIMG) {
			document.getElementById(imgId).className='transparent';
		}
		if (imgId == thisIMG) {
			document.getElementById(imgId).className='opak';
		}
	}

}

function make_all_opak(IMG_ID)
{	
	var imgs = document.getElementsByTagName("img"); // LIEST ALLE DIVS IN EIN ARRAY

	for ( var i = 0; i < imgs.length; ++i ) // DURCHLAEUFT ALLE DIVS
	{
		if (!imgs[i].id)
			continue;
		var imgId = imgs[i].id;
		var thisIMG = IMG_ID+'_img';
		if (imgId != thisIMG) {
			document.getElementById(imgId).className='opak';
		}
	}

}


function highlight_this(IMG_ID)
{	
	var imgs = document.getElementsByTagName("img"); // LIEST ALLE DIVS IN EIN ARRAY

	for ( var i = 0; i < imgs.length; ++i ) // DURCHLAEUFT ALLE DIVS
	{
		if (!imgs[i].id)
			continue;
		var imgId = imgs[i].id;
		var thisIMG = IMG_ID+'_img';
		if (imgId != thisIMG) {
			document.getElementById(imgId).className='opak';
		}
	}

}


function show_div(id)
{

	var divs = document.getElementsByTagName("div"); // LIEST ALLE DIVS IN EIN ARRAY

	for ( var i = 0; i < divs.length; ++i ) // DURCHLAEUFT ALLE DIVS
	{
		if ( !divs[i].attributes["id"] || !divs[i].className )
			continue;
		var divId = divs[i].attributes["id"].value;
		var divClass = divs[i].className;

		if ((divId != id) && (divId.substr(0,4) == "txt_") && (divClass == "infotx")) {
			document.getElementById(divId).style.display='none';
		}
	}	

	var thisStyle = document.getElementById(id).style.display;
	if (thisStyle == "none") {
		document.getElementById(id).style.display='block';
	}

	else document.getElementById(id).style.display='none';
}