//
// File:		ash.js implementation of general scripts
// Language:	Javascript
// Author:		Clifford W. Racz
//
// Copyright © 2005, 2006 Purdue University Agricultural Safety and Health
// All rights reserved.
//

function layBreadcrumbTrail()
{
	// Element referenced for the base path value
	var refElement;
	var refID			= "baseBreadcrumbHref";
	
	// URL variables
	var baseURL;
	var myURL			= location.href;
	var myExtension;
	var basePath;
	var myPath;
	var tempPath;
	var tempTitle;
	var tempLinkText;
	var tempPageName;
	var sDirs;
	var sDirVals		= new Array();
	var sPageVals		= new Array();
	var sDirTitles		= new Array();
	
	// Regular expressions
	var reBasePath		= new RegExp("^(.*\/)[^\/]+?$");
	var reStripDir		= new RegExp("^([^\/]\/)(.*)$");
	var reIsolatePath	= new RegExp("^(.*\/)[^\/]+?$");
	
	
	// Stuffing the reference arrays
	// NOTE: If there is an error in this function, it can be
	//  because a directory name is redundant.  Be sure to look
	//  at this first thing when debugging.

	// Joining
	stuffRefArray("Joining",		"Joining IRSHC",				"index.html",	sDirVals, sPageVals, sDirTitles);
	// Newsletter
	stuffRefArray("Newsletter",		"Newsletter",					"index.html",	sDirVals, sPageVals, sDirTitles);
	// Organizational
	stuffRefArray("Organization",	"Organizational Information",	"index.html",	sDirVals, sPageVals, sDirTitles);	
	// Resources
	stuffRefArray("Resources",		"Resources",					"index.html",	sDirVals, sPageVals, sDirTitles);
	stuffRefArray("Kids",			"Kids",							"kids.html",	sDirVals, sPageVals, sDirTitles);
	stuffRefArray("SafetySnippets",	"Safety Snippets",				"safetySnippets.html",	sDirVals, sPageVals, sDirTitles);
	// Contact Us
	stuffRefArray("Contact",		"Contact Information",			"index.html",	sDirVals, sPageVals, sDirTitles);
	
	

	// Let us fetch the base path
	// Note: This is designed for use with Dreamweaver, which will
	//  automatically maintain the URL of the base link in the webpage with
	//  this HREF.  Then, we fetch the HREF and use it to dissect the HREF
	//  of the Javascript "location" object.
	refElement		= document.getElementById(refID);
	baseURL			= refElement.href;
	
	// Our page is of the form [baseURL] = [basePath][index.html]
	//  so we need to strip out the [index.html] part, leaving 
	//  only [basePath] that we will use to construct the breadcrumbs.
	basePath		= baseURL;
	reIsolatePath.exec(basePath);
	basePath		= RegExp.$1;
	
	// Our page is of the form [myURL] = [myPath][foobar.html]
	//  so we need to strip out the [foobar.html] part, leaving 
	//  only [myPath] that we will use to construct the breadcrumbs.
	myPath			= myURL;
	reIsolatePath.exec(myPath);
	myPath			= RegExp.$1;
	
	// Now, let us cut out the [baseURL] substring, leaving only the relative path
	//  section of my current URL
	if( basePath == myPath.substr(0,(basePath.length)) ) {
		myExtension = myPath.substr( (basePath.length),(myPath.length-1) )
	}
	
	// Slice and dice the extension path into an array of directory names that we will
	//  then check against the predefined array of breadcrumb definitions
	sDirs	= myExtension.slice(0).split('/');
	
	// Write the breadcrumb then...
	tempPath		= basePath;
	for(i=0;i<(sDirs.length-1);i++) {
		tempLinkText	= "Previous";
		tempTitle		= "A previous directory";
		tempPageName	= "";
		
		tempPath = tempPath + sDirs[i] + "/";
		for(j=0;j<(sDirVals.length);j++) {
			// Debug
			//alert("sDirs[i]: " + sDirs[i] + "    and sDirVals[j]: " + sDirVals[j]);
			
			if(	sDirs[i] == sDirVals[j]) {
				tempLinkText	= sDirTitles[j];
				tempTitle		= tempLinkText;
				tempPageName	= sPageVals[j];
			}
		}
		
		document.write(" &gt; <a href=\"" + tempPath + tempPageName + "\" title=\"" + tempTitle + "\">");
		document.write(tempLinkText)
		document.write("</a>");
	}
	
	// And they lived happily ever after.  The end.
	
}

function highlightLink()
{
	// URL variables
	var myURL		= location.href;
	var sLinks		= new Array();
	
	sLinks	= document.getElementsByTagName('a');
	for(j=0; j<(sLinks.length); j++) {
			// Debug
			//alert("sDirs[i]: " + sDirs[i] + "    and sDirVals[j]: " + sDirVals[j]);
			
			if(	sLinks[j] == myURL) {
				sLinks[j].className = sLinks[j].className + " currentLink";
				//window.alert("Matched a link: " + sLinks[j].className);
			}
		}

	// And they lived happily ever after.  The end.
	
}

function stuffRefArray(sValue, sTitle, sPageName, aValueArray, aPageNameArray, aTitleArray)
{
	aValueArray.push(sValue);
	aPageNameArray.push(sPageName);
	aTitleArray.push(sTitle);
}

// Get the browser type
function getBrowser()
{
 	var browser		= navigator.userAgent.toLowerCase();
  	//var is_major	= parseInt(navigator.appVersion);
    //var is_minor	= parseFloat(navigator.appVersion);
    
    var browserClass;
    if (browser.indexOf('msie')!= -1) {
    	browserClass = "ie";
    }
    else if (browser.indexOf('gecko')!= -1) {
    	browserClass = "mozilla";
    }
    else if (browser.indexOf('konqueror')!= -1) {
    	browserClass = "konqueror";
    }
    else {
    	browserClass = "generic";
    }
    
    //document.write("<div>");
	//document.write(browserClass);
	//document.write("</div>");
	
    return browserClass;
}

// Get the modification time of the file being fetched
function getLastModTime() {
	modDate = new Date(document.lastModified);
	
	document.write("<div class=\"modTime\">");
	document.write( "Last update: " + modDate.toLocaleDateString( ) + " " + modDate.toLocaleTimeString() );
	document.write("</div>");

}






//
// Debug code
//

// Test the location properties
function locationTest()
{
	// hash  		Sets or returns the part of the href property that follows the hash sign (#)
	// host 		Sets or returns the hostname and port number of the location or URL
	// hostname 	Sets or returns the hostname of the location or URL
	// href 		Sets or returns the entire URL
	// pathname 	Sets or returns the file name or path specified by the location object
	// port 		Sets or returns the port number associated with the URL
	// protocol 	Sets or returns the protocol part of the URL
	// search 		Sets or returns the part of the href property that follows the question mark (?)
	document.write("<div>");
	document.write("location.hash: ");
	document.write(location.hash);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.host: ");
	document.write(location.host);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.hostname: ");
	document.write(location.hostname);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.pathname: ");
	document.write(location.pathname);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.port: ");
	document.write(location.port);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.protocol: ");
	document.write(location.protocol);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.search: ");
	document.write(location.search);
	document.write("</div>");
	
	document.write("<div>");
	document.write("location.href: ");
	document.write(location.href);
	document.write("</div>");
	
}