function showTrailer(){
	window.document.getElementById('trailer').style.visibility = 'visible';
}
function hideTrailer(){
	if(window.document.getElementById('trailer').style.visibility == 'visible') { 
		window.document.getElementById('trailer').style.visibility = 'hidden';
	}	
}

function showOuterLayer(layer){
	
	window.document.getElementById(layer).style.visibility = 'visible';

	if(layer=='OuterLayer1') {
		if(window.document.getElementById('OuterLayer2').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer2').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer3').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer3').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer4').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer4').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('trailer').style.visibility == 'visible') { 
			window.document.getElementById('trailer').style.visibility = 'hidden';
		}	
	}
	
	else if(layer=='OuterLayer2') {
		if(window.document.getElementById('OuterLayer1').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer1').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer3').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer3').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer4').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer4').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('trailer').style.visibility == 'visible') { 
			window.document.getElementById('trailer').style.visibility = 'hidden';
		}	
	}

	else if(layer=='OuterLayer3') {
		if(window.document.getElementById('OuterLayer1').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer1').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer2').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer2').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer4').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer4').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('trailer').style.visibility == 'visible') { 
			window.document.getElementById('trailer').style.visibility = 'hidden';
		}	
	}

	else if(layer=='OuterLayer4') {
		if(window.document.getElementById('OuterLayer1').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer1').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer2').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer2').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('OuterLayer3').style.visibility == 'visible') { 
			window.document.getElementById('OuterLayer3').style.visibility = 'hidden';
		}	
		if(window.document.getElementById('trailer').style.visibility == 'visible') { 
			window.document.getElementById('trailer').style.visibility = 'hidden';
		}	
	}
}

function hideOuterLayer(layer){
	window.document.getElementById(layer).style.visibility = 'hidden';
	/*window.document.getElementById('trailer-bg').style.visibility = 'hidden';*/
}

var activelayer = 0;

function showInnerLayer(no) {	

	if (document.layers) {
	   eval('document.layers.Layer'+activelayer+'.visibility="hide"');
	   eval('document.layers.Layer'+no+'.visibility="show"');
	} // ende if	
	
	else if (document.all) {
	   eval('document.all.Layer'+activelayer+'.style.visibility="hidden"');
	   eval('document.all.Layer'+no+'.style.visibility="visible"');
	} // ende else if
	
	else if (document.getElementById) { // Netscape 6 , Opera
	   eval('document.getElementById("Layer'+activelayer+'").style.visibility = "hidden"');
	   eval('document.getElementById("Layer'+no+'").style.visibility = "visible"');
	} // ende else if	
		
	activelayer = no;

} // ende showInnerLayer


function hideInnerLayer(no) {	
	
	if (document.layers) {
	   eval('document.layers.Layer'+no+'.visibility="hide"');
		activelayer	= 0;
	} // ende if	
	
	else if (document.all) {
	   eval('document.all.Layer'+no+'.style.visibility="hidden"');
		activelayer	= 0;
	} // ende else if
	
	else if (document.getElementById) { // Netscape 6 , Opera
	   eval('document.getElementById("Layer'+no+'").style.visibility = "hidden"');
		activelayer	= 0;
	} // ende else if	
		
} // ende showInnerLayer