var count = 0;

function preLoad() {
	
	// check to make sure we have an image object
	if (document.images) {
	
		// preload the folling images
		// check to see if the image is preloaded using loadCheck function
		var country = new Image(); 
		country.src = "../../images/lo/nav/nav_low_co.gif";
		
		var discuss = new Image(); 
		discuss.src = "../../images/lo/nav/nav_low_di.gif";
		
		var educators = new Image(); 
		educators.src = "../../images/lo/nav/nav_low_ed.gif";
		
		var glossary = new Image(); 
		glossary.src = "../../images/lo/nav/nav_low_gl.gif";
		
		var go = new Image(); 
		go.src = "../../images/lo/nav/nav_low_go.gif";
		
		var ideas = new Image(); 
		ideas.src = "../../images/lo/nav/nav_low_id.gif";
		
		var logo = new Image(); 
		logo.src = "../../images/lo/nav/nav_low_logo.gif";
		
		var people = new Image(); 
		people.src = "../../images/lo/nav/nav_low_pe.gif";
		
		var printbt = new Image(); 
		printbt.src = "../../images/lo/nav/nav_low_pr.gif";
		
		var resources = new Image(); 
		resources.src = "../../images/lo/nav/nav_low_re.gif";
		
		var search = new Image(); 
		search.src = "../../images/lo/nav/nav_low_se.gif";
		
		var story = new Image(); 
		story.src = "../../images/lo/nav/nav_low_st.gif";
		
		var time = new Image(); 
		time.src = "../../images/lo/nav/nav_low_ke.gif";
		
		var toggle = new Image(); 
		toggle.src = "../../images/lo/nav/nav_low_toggle.gif";
		
		var blurb = new Image(); 
		blurb.src = "../../images/lo/nav/nav_low_topblank.gif";
	}
}

// check to see that all of the images are preloaded
function loadCheck() {
	count++;
	if (count == 15) {
		alert("All images loaded properly.");
	}
} 


if (document.images) { 
	var country_on = new Image();
	country_on.src = "../../images/lo/nav/nav_low_coh.gif";
	
	var country_off = new Image();
	country_off.src = "../../images/lo/nav/nav_low_co.gif";
	
	var discuss_on = new Image();
	discuss_on.src = "../../images/lo/nav/nav_low_dih.gif";
	
	var discuss_off = new Image();
	discuss_off.src = "../../images/lo/nav/nav_low_di.gif";
	
	var educators_on = new Image();
	educators_on.src = "../../images/lo/nav/nav_low_edh.gif";
	
	var educators_off = new Image();
	educators_off.src = "../../images/lo/nav/nav_low_ed.gif";
	
	var glossary_on = new Image();
	glossary_on.src = "../../images/lo/nav/nav_low_glh.gif";
	
	var glossary_off = new Image();
	glossary_off.src = "../../images/lo/nav/nav_low_gl.gif";
	
	var go_on = new Image();
	go_on.src = "../../images/lo/nav/nav_low_goh.gif";
	
	var go_off = new Image();
	go_off.src = "../../images/lo/nav/nav_low_go.gif";
	
	var go2_on = new Image();
	go2_on.src = "../../images/lo/nav/nav_low_goh.gif";
	
	var go2_off = new Image();
	go2_off.src = "../../images/lo/nav/nav_low_go.gif";
	
	var ideas_on = new Image();
	ideas_on.src = "../../images/lo/nav/nav_low_idh.gif";
	
	var ideas_off = new Image();
	ideas_off.src = "../../images/lo/nav/nav_low_id.gif";
	
	var logo_on = new Image();
	logo_on.src = "../../images/lo/nav/nav_low_logoh.gif";
	
	var logo_off = new Image();
	logo_off.src = "../../images/lo/nav/nav_low_logo.gif";
	
	var people_on = new Image();
	people_on.src = "../../images/lo/nav/nav_low_peh.gif";
	
	var people_off = new Image();
	people_off.src = "../../images/lo/nav/nav_low_pe.gif";
	
	var printbt_on = new Image();
	printbt_on.src = "../../images/lo/nav/nav_low_prh.gif";
	
	var printbt_off = new Image();
	printbt_off.src = "../../images/lo/nav/nav_low_pr.gif";
	
	var resources_on = new Image();
	resources_on.src = "../../images/lo/nav/nav_low_reh.gif";
	
	var resources_off = new Image();
	resources_off.src = "../../images/lo/nav/nav_low_re.gif";
	
	var search_on = new Image();
	search_on.src = "../../images/lo/nav/nav_low_seh.gif";
	
	var search_off = new Image();
	search_off.src = "../../images/lo/nav/nav_low_se.gif";
	
	var story_on = new Image();
	story_on.src = "../../images/lo/nav/nav_low_sth.gif";
	
	var story_off = new Image();
	story_off.src = "../../images/lo/nav/nav_low_st.gif";
	
	var time_on = new Image();
	time_on.src = "../../images/lo/nav/nav_low_keh.gif";
	
	var time_off = new Image();
	time_off.src = "../../images/lo/nav/nav_low_ke.gif";

	// remote rollover for blurb
	var firstimage=new Image();
	firstimage.src="../../images/lo/nav/nav_low_toggle.gif";
	var secondimage=new Image();
	secondimage.src="../../images/lo/nav/nav_low_toggleh.gif";
	var remoteimage=new Image();
	remoteimage.src="../../images/lo/nav/nav_low_topblank.gif";
	var remoteimagenew=new Image();
	remoteimagenew.src="../../images/lo/nav/nav_low_topblurb.gif";

	// end the remote rollover

}


// changeImages creates the rollover
function changeImages() {
	if (document.images) { 
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
		}
	}
}





// force tables in  NN to go all the way to the right margin
// by adding a transparent spacer

function makeIt (num,exception) {
	var browser = navigator.appName;
	 var version = parseInt(navigator.appVersion);
	 var width;
	 // pick location from browser address bar so script can be used at any level 
			 
	 if (browser == "Netscape" && version >= '4') {
		width = window.innerWidth;
		if (num == 'total') {
			space = '<img src=/wgbh/commandingheights/images/singpix.gif width= ' + width + ' height=1  border=0  alt="" />'; 
			return space;
		} else if (width <= num) {  
			space = '&nbsp;';
		} else {
			
			width = width - num; 
			//make sure path to spacer.gif is correct
			space = '<img src=/wgbh/commandingheights/images/singpix.gif width= ' + width + ' height=1  border=0  alt="" />'; 
		}
	 } else if (browser != "Netscape" && num == 'total') {
		space = '';
	 } else if (browser !="Netscape" && exception == "IE") {
		space = '';		 	
	 } else {
		space = '&nbsp;';
	 }
	 return space;
}

// -->
//Force NN to reload on re-size
function fixNN () {
	var ua = navigator.appName;
	var uanum = parseFloat(navigator.appVersion);
	if (ua == "Netscape" && uanum >= '4.08') {
		location.reload();
	} else {
		return;
	}
}