/******************************************************************************
*                                                                             *
* This Javascript iterates through the page causing certain links to pop up   *
* windows when clicked. I got much assistance in writing this from            *
* <alistapart.com> and <sitepoint.com>.                                       *
*                                                                             *
* Author:   Michael A. Smith                                                  *
* Modified: 12/20/05                                                          *
*                                                                             *
******************************************************************************/

/** Performs the popUp action */
function popupWin(link, attribs, rel) {
	// if quitMsg is defined, ask for confirmation
	if(isThirdParty(link) == "t"){
	if(quitMsg && !confirm(quitMsg)) return;	
	}
 	// rel describes the relationship of the new window
  	if (rel == "") rel = "_blank";
	window.open(link, rel, attribs);
} // end popupWin

/** Returns true if the href doesn't end in cfm, html, htm, or xml */
function isSpecialFile(href) {
	href = cleanHashFromURL(href);
	href = cleanParamsFromURL(href);
  var fileExt = getFileExtension(href);

  if (fileExt == "") return false;  // If there's no file extension, bail
  return ((fileExt != "cfm") &&
          (fileExt != "html") &&
          (fileExt != "htm") &&
          (fileExt != "xml"));
} // end isSpecialFile

/** Gets the file extension. Returns an empty string if unknown. */
function getFileExtension(href) {
  if (href.indexOf(".") < 0) return ""; // If there's no "." in the URL, bail

  var extArray = href.split(".");
  var lastIndex = [extArray.length - 1];
  var ext = extArray[lastIndex];

  // If there's a "/" in the extension, bail
  if (ext.indexOf("/") > -1) return "";

  return ext.split("?")[0]; // If there's a ? in the extension, truncate there
} // end getFileExtension


/** Gets the protocol (http, https, mailto, etc...) */
function getURLProtocol(href) {
  /* Gecko browsers return the actual href attribute. IE and Opera return the
     calculated complete URL from the protocol on. */
  var prot = href.split(":")[0];

  // if there's a slash or pound in the prot we assume it's http (for geckos)
  if (prot.indexOf("/") > -1) return "http";
  if (prot.indexOf("#") > -1) return "http";

  return prot;
} // end getURLProtocol

/** clean hashes from urls */
function cleanHashFromURL(url) {
  var index = url.indexOf("#");
  if (index < 0) return url;

  return url.substring(0, index);
} // end cleanHashFromURL

/** clean parameters from urls */
function cleanParamsFromURL(url) {
  var index = url.indexOf("?");
  if (index < 0) return url;

  return url.substring(0, index);
} // end cleanParamsFromURL


/** Returns false if the href can be determined to be an external link. */
function isInternal(href) {

  href = cleanHashFromURL(href); // if the URL has a # get rid of it

  // count as internal if there are no "/"s in the URL
  if (href.indexOf("/") < 0) return true;

  // split the URL into an array of strings across the "/" character
  var hrefSplit = href.split("/");

  // if gecko use the simple method of looking for "http" in the URL.
  if (!(document.all || window.opera))
    return (hrefSplit[0].indexOf("http") < 0);

  // if the browser is not gecko...

  // "url" is from the href attribute of the anchor tag
  var url = "";
  if (hrefSplit[2]) url = hrefSplit[2];

  // httpHost is the 2nd string from the window.location.href split across "/"
  var locHrefSplit = window.location.href.split("/");
  var httpHost = "";
  if (locHrefSplit[2]) httpHost = locHrefSplit[2];

  /* Count as internal if the url or the current site url doesn't exist
     (shouldn't ever happen) */
  if (!(url && httpHost)) return true;

  // otherwise check that the current site matches the url
  return (url == httpHost);
} // end isInternal


/** determine whether or not the popup should happen */
function isPopUp(rel, href){

  // if the href value is empty or null, don't pop up
  if (!href) return false;

  // if the URL protocol is not http or https, don't popup
  if (getURLProtocol(href).indexOf("http") < 0) return false;

  // if the rel attribute exists, pop up
  if (rel) return true;

  // if the link is to an image, pdf, or other special file, pop up
  if (isSpecialFile(href)) return true;

  // if the link is to an external file, pop up
  return (!isInternal(href));
} // isPopUp

// Check if we need to confirm(quitMsg)
function isThirdParty(link){
	var siteNames = new Array();
	siteNames[0] = "lanxess";
	siteNames[1] = "saltigo";
	siteNames[2] = "bayferrox";
	siteNames[3] = "rheinchemie";
	siteNames[4] = "sybron";
	siteNames[5] = "expertsforadditives";
	siteNames[6] = "experts4additives";
	siteNames[7] = "phosphorus-chemicals";
	siteNames[8] = "ion-exchange";
	siteNames[9] = "colorants.bayerchemicals";
	siteNames[10] = "specialtychemicals.bayer";
	siteNames[11] =	"therban";
	siteNames[12] =	"baypure";
	siteNames[13] =	"levapren.com";
	siteNames[14] =	"levamelt";
	siteNames[15] =	"baypure";
	siteNames[16] = "buna";
	siteNames[17] = "baypren";
	var thirdParty = "t"
	if(link.indexOf("/")==0){thirdParty = "f";}
	for(var i=0; i<siteNames.length; i++){
		if(link.indexOf(siteNames[i])>0){thirdParty = "f";}
	}
	return(thirdParty);
}

/**
  This is the function you call when the page loads. It iterates through the
  page looking for anchor tags to which to attach.
*/
function popupWindows() {
  /*
    check that the user agent is modern enough to perform necessary
    operations.
  */
  if(!document.getElementsByTagName) return;

  // get an array of all anchor tags on the page
  var anchors = document.getElementsByTagName("a");
  // loop through all the anchor tags
  for (var i = 0; i < anchors.length; i++) {
    // current anchor
    var anchor = anchors[i];
    // href attribute
    var href = anchor.getAttribute("href");
    // rel attribute
    if(anchor.getAttribute("rel") || href.indexOf("/") > 1){
	    var rel = anchor.getAttribute("rel");

	    // if we shouldn't pop up, go to the next step in the for loop
	    if (!isPopUp(rel, href)) continue;

	    // at this point we've determined that we should popup the link

	    // default window attributes
	    var winWidth =      650;
	    var winHeight =     350;
	    var winLocation =   "yes";
	    var winMenubar =    "yes";
	    var winStatus =     "yes";
	    var winScrollbars = "yes";
	    var winResizable =  "yes";
	    var winToolbar =    "yes";

	    // rel can change the attributes
			// @@@ status bar option not respected by firefox?
			switch (rel) {
				case "":
					continue;
					break;

				case "sidebar":
					//just in time breakout
					continue;
					break; // end case "sidebar"
				case "prodDesc":
					winWidth =      710;
					winHeight =     215;
					winLocation =   "no";
					winMenubar =    "no";
					winStatus =     "no";
					winScrollbars = "no";
					winToolbar =    "no";
					winResizable =  "no";
					break; // end case "prodDesc"
				case "brochure":
					winWidth =      710;
					winHeight =     215;
					winLocation =   "no";
					winMenubar =    "no";
					winStatus =     "no";
					winScrollbars = "yes";
					winToolbar =    "no";
					winResizable =  "yes";
					break; // end case "prodDesc"
			} // end switch-case block

	    // stick all the attributes together in a single string
	    var winAttributes;
	    winAttributes  =  "width=" +      winWidth;
	    winAttributes += ",height=" +     winHeight;
	    winAttributes += ",location=" +   winLocation;
	    winAttributes += ",menubar=" +    winMenubar;
	    winAttributes += ",status=" +     winStatus;
	    winAttributes += ",scrollbars=" + winScrollbars;
	    winAttributes += ",resizable=" +  winResizable;
	    winAttributes += ",toolbar=" +    winToolbar;

	    // stick the "onclick" attribute stuff together as a string
	    var onclick = "popupWin('" + href + "','" + winAttributes + "', '";
	    onclick    += rel + "');return false;";

	    // attach the onclick attribute to the anchor tag
	    anchor.setAttribute("onclick", onclick);

	    // if not IE we're done
	    if (!document.all) continue;

	    /* IE is... "special" -- you have to attach a function reference to events
	    for IE elements */
	    anchor.onclick = function() {
	      popupWin(this.href, winAttributes, this.rel);
	      return false;
	    }
	}
  } // end for loop
} // end popupWindows