var isNS4 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) == 4 );
var isNS6 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 5 );
var isMac = (navigator.platform == "MacPPC");
var IE = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) >=4 );
var isOpera = (navigator.userAgent =="Opera");

//code for preload images 'navigation' 

if (document.images) {
	da_image = new Image();
	da_image.src="favicon.ICO";
	
	navoverviewon = new Image();
	navoverviewon.src = "navigation/nav_overview_on.gif";
	navoverviewoff = new Image();
	navoverviewoff.src = "navigation/nav_overview_off.gif";
	navathenaon = new Image();
	navathenaon.src = "navigation/nav_athena_on.gif";
	navathenaoff = new Image();
	navathenaoff.src = "navigation/nav_athena_off.gif";
	navproductson = new Image();
	navproductson.src = "navigation/nav_products_on.gif";
	navproductsoff = new Image();
	navproductsoff.src = "navigation/nav_products_off.gif";
	navgison = new Image();
	navgison.src = "navigation/nav_gis_on.gif";
	navgisoff = new Image();
	navgisoff.src = "navigation/nav_gis_off.gif";
	navcelldesignon = new Image();
	navcelldesignon.src = "navigation/nav_celldesign_on.gif";
	navcelldesignoff = new Image();
	navcelldesignoff.src = "navigation/nav_celldesign_off.gif";
	navaboutwcon = new Image();
	navaboutwcon.src = "navigation/nav_aboutwc_on.gif";
	navaboutwcoff = new Image();
	navaboutwcoff.src = "navigation/nav_aboutwc_off.gif";
	navlinkson = new Image();
	navlinkson.src = "navigation/nav_links_on.gif";
	navlinksoff = new Image();
	navlinksoff.src = "navigation/nav_links_off.gif";
	navcontactuson = new Image();
	navcontactuson.src = "navigation/nav_contactus_on.gif";
	navcontactusoff = new Image();
	navcontactusoff.src = "navigation/nav_contactus_off.gif";
	//navdiscussionon = new Image();
	//navdiscussionon.src = "navigation/nav_discussion_on.gif";
	//navdiscussionoff = new Image();
	//navdiscussionoff.src = "navigation/nav_discussion_off.gif";
	folderoneon = new Image();
	folderoneon.src = "sitewide/folder_1_on.gif";
	folderoneoff = new Image();
	folderoneoff.src = "sitewide/folder_1_off.gif";
	overviewdwnloadon = new Image();
	overviewdwnloadon.src = "overview/overview_dwnload_1_on.gif";
	overviewdwnloadoff = new Image();
	overviewdwnloadoff.src = "overview/overview_dwnload_1_off.gif";
}

//code for resize

if (isNS4){ 

	if(!window.saveInnerWidth){
	
	  window.onresize = resizeIt;
	  window.saveInnerWidth = window.innerWidth;
	  window.saveInnerHeight = window.innerHeight;
	}
	
	function resizeIt(){
	
	    if (saveInnerWidth < window.innerWidth ||
	        saveInnerWidth > window.innerWidth ||
	        saveInnerHeight > window.innerHeight ||
	        saveInnerHeight < window.innerHeight )
	    {
			location.reload();
	        //window.history.go(0);
	    }
	}
}

// code for rollovers1

function changeImage(image, newsource, layername){ 

	if (isNS4) 
	{
		document.layers[layername].document.images[image].src = eval(newsource + ".src");
	}
	else 
	{
		document.images[image].src = eval(newsource + ".src");
	}
}

// code for rollovers2

function changeImage2(image1, newsource1, layername1, image2, newsource2, layername2){

	if(isNS4){
	
		document.layers[layername1].document.images[image1].src = eval(newsource1 + ".src");
		document.layers[layername2].document.images[image2].src = eval(newsource2 + ".src");		
	} 
	else{
	
		document.images[image1].src = eval(newsource1 + ".src");
		document.images[image2].src = eval(newsource2 + ".src");		
	}	
}

// code for centered pop-ups


function newWindow(mypage, myname, w, h, scroll, title) {
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',titlebar='+title
win = window.open(mypage,myname,winprops)
win.window.focus();
}