function showLayer(LayerName) {
	if (document.getElementById) { 
  		objLayer = document.getElementById(LayerName).style; 
  	} else {
		var doc = document.layers; 
		var style = '';
	    objLayer = eval('doc.' + LayerName + style);
	}
   	objLayer.visibility = 'visible';
}
// ===================================================
function hideLayer(LayerName) {
	if (document.getElementById) { 
  		objLayer = document.getElementById(LayerName).style; 
  	} else {
		var doc = document.layers; 
		var style = '';
	    objLayer = eval('doc.' + LayerName + style);
	}
   	objLayer.visibility = 'hidden';
}
// ===================================================
function showPresentation() {
	PresentationWin = window.open("info/presentation.htm","PresentationWin","toolbar=no,width=740,height=595,top=25,left=25,status=no,scrollbars=no,resize=no,menubar=no");
}
// ===================================================
function showVideo() {
	VideoWin = window.open("info/videoplayer.htm","VideoWin","toolbar=no,width=740,height=595,top=25,left=25,status=no,scrollbars=no,resize=no,menubar=no");
}
// ===================================================
function showOrder() {
	OrderWin = window.open("info/order.htm","OrderWin","toolbar=no,width=740,height=450,top=25,left=25,status=no,scrollbars=no,resize=no,menubar=no");
}