// precache nav images
var levels = 2;
var navs = 7;

var i = 0;
for (i=1; i<=levels; i++) {
	var x = 0;
	for (x=1; x<=navs; x++) {
		eval("var l" + i + "nav" + x + " = new Image();");
		eval("l" + i + "nav" + x + ".src = \"images/nav/level" + i + "_nav" + x + ".gif\";");
		eval("var l" + i + "nav" + x + "hi = new Image();");
		eval("l" + i + "nav" + x + "hi.src = \"images/nav/level" + i + "_nav" + x + "hi.gif\";");
	}
}

function rollover(img) {
	document[img].src = eval(img + "hi.src");
	
	return true;
}

function rollout(img) {
	document[img].src = eval(img + ".src");
	
	status = '';
	
	return true;
}

function changeLayerText(lyrname, newtext) {
	var lyrobj = getRawObject(lyrname);
	
	if (document.getElementById || document.all) {
		lyrobj.innerHTML = newtext;
	} else if (document.layers) {		
		lyrobj.document.write(newtext);
		lyrobj.document.close();
	}
}

// this returns the raw object specified by objname.
function getRawObject(objname) {
	var lyrobj;
	
	if (document.getElementById) {
		lyrobj = document.getElementById(objname);
	} else if (document.all) {
		lyrobj = document.all[objname];
	} else if (document.layers) {
		lyrobj = document.layers[objname];
	}
	
	if (!lyrobj) {
		lyrobj = document[lyrobj];
	}
	
	return lyrobj;
}

function jumpToGrade(menu) {
	var gradelvl = menu.options[menu.selectedIndex].value;
	
	location = '#'+gradelvl;
}

function popupWindow(imageName,imageWidth,imageHeight,alt,bgcolor,hugger,hugMargin,caption) {

	if (bgcolor=="") {
		bgcolor="#FFFFFF";
	}
	var adj=10
	var w = screen.width;
	var h = screen.height;
	var byFactor=1;

	if(w<740){
	  var lift=0.90;
	}
	if(w>=740 & w<835){
	  var lift=0.91;
	}
	if(w>=835){
	  var lift=0.93;
	}
	if (imageWidth>w){	
	  byFactor = w / imageWidth;			
	  imageWidth = w;
	  imageHeight = imageHeight * byFactor;
	}
	if (imageHeight>h-adj){
	  byFactor = h / imageHeight;
	  imageWidth = (imageWidth * byFactor);
	  imageHeight = h; 
	}
	   
	var scrWidth = w-adj;
	var scrHeight = (h*lift)-adj;

	if (imageHeight>scrHeight){
  	  imageHeight=imageHeight*lift;
	  imageWidth=imageWidth*lift;
	}

	var posLeft=0;
	var posTop=0;

	if (hugger == "hug image"){
	  if (hugMargin == ""){
	    hugMargin = 0;
	  }
	  var scrHeightTemp = imageHeight - 0 + 2*hugMargin;
	  if (scrHeightTemp < scrHeight) {
		scrHeight = scrHeightTemp;
	  } 
	  var scrWidthTemp = imageWidth - 0 + 2*hugMargin;
	  if (scrWidthTemp < scrWidth) {
		scrWidth = scrWidthTemp;
	  }
	  
	  if (scrHeight<100){scrHeight=100;}
	  if (scrWidth<100){scrWidth=100;}

	  posTop =  ((h-(scrHeight/lift)-adj)/2);
	  posLeft = ((w-(scrWidth)-adj)/2);
 	}

	if (imageHeight > (h*lift)-adj || imageWidth > w-adj){
		imageHeight=imageHeight-adj;
		imageWidth=imageWidth-adj;
	}
	posTop = parseInt(posTop);
	posLeft = parseInt(posLeft);		
	scrWidth = parseInt(scrWidth); 
	scrHeight = parseInt(scrHeight);
	
	var agt=navigator.userAgent.toLowerCase();
	if (agt.indexOf("opera") != -1){
	  var args= new Array();
	  args[0]='parent';
	  args[1]=imageName;
	  var i ; document.MM_returnValue = false;
	  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
	} else {
	newWindow = window.open("vwd_justso.htm","newWindow","width="+scrWidth+",height=400,left="+posLeft+",top="+posTop);
	newWindow.document.open();
	newWindow.document.write('<html><head><title>'+alt+'</title></head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><body leftmargin="0" topmargin="0" marginheight="0" marginwidth="0" bgcolor='+bgcolor+'>');  
	newWindow.document.write('<table width='+imageWidth+' height='+imageHeight+' border="0" cellspacing="0" cellpadding="0" align="center"><tr valign="top"><td>');
	newWindow.document.write('<img src="'+imageName+'" width='+imageWidth+' height='+imageHeight+' >'); 
	newWindow.document.write('<br><font face="Arial" size="2">'+caption+'</font></td></tr></table></body></html>');
	newWindow.document.close();
	newWindow.focus();
	}
}

function goVisitSite(Site){
NewWindow1 =window.open(Site, "viewwin","toolbar=0,width=650,height=450,scrollbars=no,resizable=no");
}
