function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

if (document.images)	{
	//arrow thumbnail, blank thumbnail
	reddot = new Image();			reddot.src = "../images/reddot.gif"
	blank = new Image();			blank.src = "../images/spacer.gif"
}

function chgImg(imgBlank,newImg) {
	if (document.layers) {
		document.layers['divcontent'].document[imgBlank].src = eval(newImg + ".src");
	}
    else if (document.images && !isNN4) {
    	document[imgBlank].src= eval(newImg + ".src");
	}
}

function imgOn(imgName) {
    if (document.images) {
        document[imgName].src = eval(imgName + "o.src");
    }
}

function imgOff(imgName) {
    if (document.images) {
        document[imgName].src = eval(imgName + ".src");
    }
}


function openWin(wval,hval,page,wname) {
	var theSpecs = "toolbar=no,width=" + wval + ",height=" + hval + ",status=no,scrollbars=no,resizable=no,menubar=no";
	newWin=window.open(page,wname,theSpecs);
}

//browser detection:

var isNN4, isIE4, isDOM;

if (document.getElementById) {
	isDOM = true;               //W3C DOM browsers including NN6 & IE5+
}
else if (parseInt(navigator.appVersion) >=4) {
	if (navigator.appName == "Netscape") {
		isNN4 = true;
	}
	if (navigator.appName == "Microsoft Internet Explorer") {
		isIE4 = true;
	}
}
	
function showdiv(id) {
	if (isDOM) {
		var theCaption = document.getElementById(id);
		theCaption.style.visibility = "visible";
	} else if (isNN4) {
		 document.layers['divcontent'].layers['imageblock'].layers[id].visibility = "show";
	} else if (isIE4) {
		document.all[id].style.visibility = "visible";
	}
}
  
function hidediv(id) {        //hide all captions except for "caption" + id.

	if (isDOM) {
		for (var i = 0; i < thediv.length; i++) {
			if (i != id) {	
				document.getElementById(thediv[i]).style.visibility = "hidden";
			}
		}
	} else if (isNN4) {
		for (var i = 0; i < thediv.length; i++) {
			if (i != id) {
				document.layers['divcontent'].layers['imageblock'].layers[thediv[i]].visibility = "hide";
			}
		}
		
	} else if (isIE4) {
		for (var i = 0; i < thediv.length; i++) {
			if (i != id) {	
				document.all[thediv[i]].style.visibility = "hidden";
			}
		}
	}
	
}