loadimage('findbookon','http://www.penguin.ca/static/cs/cn/0/images/home/but_findbook_on.gif')
loadimage('findbookoff','http://www.penguin.ca/static/cs/cn/0/images/home/but_findbook_off.gif')
loadimage('authorson','http://www.penguin.ca/static/cs/cn/0/images/home/but_authors_on.gif')
loadimage('authorsoff','http://www.penguin.ca/static/cs/cn/0/images/home/but_authors_off.gif')
loadimage('clubsgroupson','http://www.penguin.ca/static/cs/cn/0/images/home/but_clubsgroups_on.gif')
loadimage('clubsgroupsoff','http://www.penguin.ca/static/cs/cn/0/images/home/but_clubsgroups_off.gif')
loadimage('abouton','http://www.penguin.ca/static/cs/cn/0/images/home/but_about_on.gif')
loadimage('aboutoff','http://www.penguin.ca/static/cs/cn/0/images/home/but_about_off.gif')


// Show/Hide functions for non-pointer layer/objects

//DHTML Functions 
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
ns6 = (!document.all && document.getElementById)? true:false
isMac = (navigator.appVersion.indexOf("Mac") != -1);
SelectedMenu = "";

//detect Netscape 4.7+
if (navigator.appName=="Netscape"&&(parseFloat(navigator.appVersion)>=4.7)&&parseFloat(navigator.appVersion)<5)
{ // Netscape 4.7 version
LeftPosAdjust = 1;
divstr="layer"
stylestr="position=absolute left=";
stylestrx="px top=";
stylestry="px visibility=hidden z-index=1"
} else {
if (navigator.appName=="Netscape") { // Netscape 7.0 version
LeftPosAdjust = 3;
} else { // IE version
LeftPosAdjust = 1;
}
divstr="div"
stylestr='STYLE="position:absolute; left:'
stylestrx='px; top:';
stylestry='px; visibility:hidden; z-index:1;"'
}
if (LeftPosAdjust <10) {LeftPosAdjust=10}  // Don't shrink smaller than 800x600

function ShowMenu(Menu) {
	SelectedMenu = Menu;
	if (ns4) {
	document.layers[Menu].visibility = "show"
	}
	else if (ie4) document.all[Menu].style.visibility = "visible"
		else if (ns6) document.getElementById(Menu).style.visibility = "visible"
		
}
function DelayHideMenu(Menu) {
	if (SelectedMenu != Menu) {
	  if (ns4) document.layers[Menu].visibility = "hide"
	  else if (ie4) document.all[Menu].style.visibility = "hidden"
	  		else if (ns6) document.getElementById(Menu).style.visibility = "hidden"
	}
}
function HideMenu(Menu) {
SelectedMenu = "";
setTimeout("DelayHideMenu('" +Menu+"')", 60);
}

function ShowMenuItem(Menu,Item,State) {
	if (State=="on") {SelectedMenu = Menu};
    //filename = "images/but_" + Item + "_" + State + ".gif"
	//if (ns4) document.layers[Menu].document.images[Item].src = filename
	//else if (ie4) document.images[Item].src = filename
	//	else if (ns6) document.images[Item].src = filename
	if (State=="off") HideMenu(Menu);
}

function showImage(fname) {
iname=eval(fname + "on.src");
document[fname].src = iname;}

function hideImage(fname) {
 iname=eval(fname + "off.src");
 document[fname].src = iname;
}

function loadimage(imgObj,imgSrc) {
                if (document.images) {
                        eval(imgObj+' = new Image()')
                        eval(imgObj+'.src = "'+imgSrc+'"')
                }
        }