// 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);
	}
}

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

document.write("<table width='100%' border='0' cellspacing='0' cellpadding='0' align='left'><tr><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='2' width='15'></td></tr>");

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

	//draw main nodes

	if(wasActiveNode){
		drawDots=false;
	}
	if ((currentURL.indexOf(getPath(NAV_NODES[x][1])) != -1 || expandCurrentNode == true)&&x!=0) {
		document.write("<tr valign='middle' bgcolor='#7784C0'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='4' width='15'></td></tr>");
		document.write("<tr valign='middle' bgcolor='#7784C0'><td><img src='../../includes/site_images/spacers/spacer.gif' height='5' width='15'></td><td colspan='2'><a href='" + NAV_NODES[x][1] + "' class='nav_section_active'>" + NAV_NODES[x][0] + "</a></td></tr>");
		expandCurrentNode = true;
		wasActiveNode=true;
	} else {
		if(drawDots){
			document.write("<tr valign='top'><td><img src='../../includes/site_images/spacers/spacer.gif' height='1' width='15'></td><td colspan='2'><img src='../../includes/site_images/nav/nav_divider.gif' width='165' height='1'></td></tr>");
		}
		document.write("<tr valign='middle'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='3' width='15'></td></tr>");
		document.write("<tr valign='middle'><td><img src='../../includes/site_images/spacers/spacer.gif' height='5' width='15'></td><td colspan='2'><a href='" + NAV_NODES[x][1] + "' class='nav_section'>" + NAV_NODES[x][0] + "</a></td></tr>");
		document.write("<tr valign='middle'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='4' width='15'></td></tr>");
		wasActiveNode=false;
		if (NAV_NODES[x+1]==null){
			document.write("<tr valign='top'><td><img src='../../includes/site_images/spacers/spacer.gif' height='1' width='15'></td><td colspan='2'><img src='../../includes/site_images/nav/nav_divider.gif' width='165' height='1'></td></tr>");
		}
	}

	//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){
				if(x>0){
					document.write("<tr bgcolor='#7784C0' valign='top'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='8' width='180'></td></tr>");
				}
				break;
			}
			if (currentURL.indexOf(getPath(NAV_NODES[x][y][1])) != -1) {
				document.write("<tr valign='top' bgcolor='#7784C0'><td><img src='../../includes/site_images/spacers/spacer.gif' height='15' width='15'></td><td><span class='nav_subsection'>-&nbsp;</span></td>");
				document.write("<td><a href='" + NAV_NODES[x][y][1] + "' class='nav_subsection_active'>" + NAV_NODES[x][y][0] + "</a></td></tr>");
				if (NAV_NODES[x][y+1] == null){
					document.write("<tr bgcolor='#7784C0' valign='top'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='6' width='180'></td></tr>");
				}
			} else {
				document.write("<tr valign='top' bgcolor='#7784C0'><td><img src='../../includes/site_images/spacers/spacer.gif' height='15' width='15'></td><td><span class='nav_subsection'>-&nbsp;</span></td>");
				document.write("<td><a href='" + NAV_NODES[x][y][1] + "' class='nav_subsection'>" + NAV_NODES[x][y][0] + "</a></td></tr>");
				if (NAV_NODES[x][y+1] == null){
					document.write("<tr bgcolor='#7784C0' valign='top'><td colspan='3'><img src='../../includes/site_images/spacers/spacer.gif' height='8' width='180'></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];}
}