// Determine browser.

var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 &&
                parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.")) >= 0 ? 1 : 0;

var activeImg = "";
var layerVis = '';
var flag = 0;
//-----------------------------------------------------------------------------
// Layer visibility.
//-----------------------------------------------------------------------------

function hideLayer(layer) {

  if (isMinNS4)
    layer.visibility = "hide";
  if (isMinIE4)
    layer.style.visibility = "hidden";
}

function showLayer(layer) {
if (isMinNS4) {
	if (flag == 1) {
	 	hideLayer(layerVis);
	}       
	layer.visibility = "show";
	layerVis = layer;
	flag = 1;
}
if (isMinIE4) {
	if (flag == 1) {
		hideLayer(layerVis);
	}       
	layer.style.visibility = "visible";
	layerVis = layer;
	flag = 1;
}
}

function changeImages() {
if (document.images) {
	
	if(changeImages.arguments.length == 3){
		for (var i=0; i<changeImages.arguments.length; i+=3) {
			if(isMinNS4){
				document.layers[changeImages.arguments[i]].document[changeImages.arguments[i+1]].src = eval(changeImages.arguments[i+2] + ".src");
			}else if(isMinIE4){
				document[changeImages.arguments[i+1]].src = eval(changeImages.arguments[i+2] + ".src");
			}
		}
	}else if (changeImages.arguments.length == 2){
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			if(isMinNS4){
				document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
			}else if(isMinIE4){
				document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
			}
		}
	}
}	

}