// Left Navigation Script for NYC.gov Agency Templates

// Returns path with folder and file, else -1.
// ex. /folder/file.html
function getPath(thePath) {
	if (thePath == null) { return -1; }
	var startSlash = thePath.lastIndexOf("/");
	startSlash = thePath.lastIndexOf("/",startSlash -1);

	if (startSlash == -1) {
		return -1;
	} else {
		return thePath.substr(startSlash, thePath.length - startSlash);
	}
}

// Returns folder, else -1.
// ex. /folder/
function getFolder(thePath) {
	if (thePath == null) { return -1; }
	var startSlash = thePath.lastIndexOf("/");
	startSlash2 = thePath.lastIndexOf("/",startSlash -1);

	if(startSlash == startSlash2) { return -1; }
	if (startSlash == -1 || startSlash2 == -1) {
		return -1;
	} else {
		return thePath.substr(startSlash2, startSlash - startSlash2 + 1);
	}
}

function getImageName(theFileName){
	theFileName=theFileName.toLowerCase().replace(/\s+|-|\//gi,'_');
	theFileName=theFileName.replace(/"/gi,'');
	return(theFileName);
}

var currentURL = getPath(location.href);
var expandCurrentNode = false;
var haveNodes = false;

document.write("<table width='100%' border='0' cellspacing='0' cellpadding='0'>");

for(x=0;x<NAV_NODES.length;x++) {
	expandCurrentNode = false;
	haveNodes = false;

	//check for sub nodes
	if (NAV_NODES[x] == null) break;
	if (NAV_NODES[x].length > 2) {
		if (currentURL.indexOf(getFolder(NAV_NODES[x][1])) != -1) {
			expandCurrentNode = true;
		}
		for(y=2;y<NAV_NODES[x].length;y++) {
			if (NAV_NODES[x][y] == null) break;
			if (NAV_NODES[x][y][1] != null) haveNodes = true;
			if (currentURL.indexOf(getPath(NAV_NODES[x][y][1])) != -1) {
				expandCurrentNode = true;
			}
		}
	}
	var theFolder=getFolder(NAV_NODES[x][1]);
	var drawnSub=false;
	theFolder=theFolder.substr(1,theFolder.length-2);
	var theName=getImageName(NAV_NODES[x][0]);
	//draw main nodes
	
	currentURL.indexOf("mpaa_psas.shtml")
	
	if ((currentURL.indexOf("/index/")==-1)&&(currentURL.indexOf(getPath(NAV_NODES[x][1])) != -1 || expandCurrentNode == true)) {
		if((currentURL.indexOf("mpaa_psas.shtml")>-1&&NAV_NODES[x][1].indexOf("news_home.shtml")>-1)||(currentURL.indexOf("news_home.shtml")>-1&&NAV_NODES[x][1].indexOf("mpaa_psas.shtml")>-1)||(currentURL.indexOf("nyc_green_screen.shtml")>-1&&NAV_NODES[x][1].indexOf("resources_home.shtml")>-1)||(currentURL.indexOf("resources_home.shtml")>-1&&NAV_NODES[x][1].indexOf("nyc_green_screen.shtml")>-1)){
			document.write("<tr valign='top'><td><a onMouseOver=MM_swapImage('"+theName+"','','../../images/buttons/"+theName+"_over.gif',0) onMouseOut=MM_swapImgRestore() href="+NAV_NODES[x][1]+"><img src='../../images/buttons/"+theName+".gif' alt='"+ NAV_NODES[x][0] + "' border='0' name='"+theName+"'></a></td></tr>");
			MM_preloadImages("../../images/buttons/"+theName+"_over.gif");
		}else{
			document.write("<tr valign='top'><td><a onMouseOver=MM_swapImage('"+theName+"','','../../images/buttons/"+theName+".gif',0) onMouseOut=MM_swapImgRestore() href="+NAV_NODES[x][1]+"><img src='../../images/buttons/"+theName+"_over.gif' alt='"+ NAV_NODES[x][0] + "' border='0' name='"+theName+"'></a></td></tr>");
			MM_preloadImages("../../images/buttons/"+theFolder+".gif");
			expandCurrentNode = true;
		}
	} else {
		document.write("<tr valign='top'><td><a onMouseOver=MM_swapImage('"+theName+"','','../../images/buttons/"+theName+"_over.gif',0) onMouseOut=MM_swapImgRestore() href="+NAV_NODES[x][1]+"><img src='../../images/buttons/"+theName+".gif' alt='"+ NAV_NODES[x][0] + "' border='0' name='"+theName+"'></a></td></tr>");
		MM_preloadImages("../../images/buttons/"+theName+"_over.gif");
	}

	//draw sub nodes
	if (NAV_NODES[x].length > 2 && expandCurrentNode == true) {
		for(y=2;y<NAV_NODES[x].length;y++) {
			if (NAV_NODES[x][y] == null) break;
			if (currentURL.indexOf(getPath(NAV_NODES[x][y][1])) != -1) {
				document.write("<tr valign='top'><td class='nav_subsection'><a href='" + NAV_NODES[x][y][1] + "' class='nav_subsection_active'>" + NAV_NODES[x][y][0] + "</a></td></tr>");
				drawnSub=true;
			} else {
				document.write("<tr valign='top'><td class='nav_subsection'><a href='" + NAV_NODES[x][y][1] + "' class='nav_subsection'>" + NAV_NODES[x][y][0] + "</a></td></tr>");
				drawnSub=true;
			}
		}
	}
	if(drawnSub){
		document.write("<tr><td><img src='../../includes/site_images/spacers/spacer.gif' width='153' height='1' alt='' border=''></td></tr>");
	}

}

document.write("</table>");

// The following DW JS is used for imageover effects

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}