/************************************
 *
 * Automatically tag links for Google Analytics to
 * simplify tracking across domains. 
 *
 * Peter McKenna
 * peter.mckenna@iqcontent.com
 * 
 * v1. Initial script
 *
 ************************************/

// Config Variables.
var domains_to_track = 
	[
	 'www.eriez.com',
 	 'en-au.eriez.com',
 	 'en-ca.eriez.com',
	 'en-gb.eriez.com',
	 'en-us.eriez.com',
	 'en-za.eriez.com',
	 'es-mx.eriez.com',
	 'hi-in.eriez.com',
	 'ja-jp.eriez.com',
	 'zh-cn.eriez.com',
	 'polymag.eriez.com',
	 'prograde.eriez.com',
	 'xpress.eriez.com',
	 '*.coolantcleaners.com',
	 '*.crossbeltmagnets.com',
	 '*.drummagnets.com',
	 '*.eddycurrentseparators.com',
	 '*.e-ztec.com',
	 '*.gratemagnets.com',
	 '*.industrialmetaldetectors.com',
	 '*.liftmagnets.com',
	 '*.magna-rails.com',
	 '*.magna-rolls.com',
	 '*.magneticchipconveyors.com',
	 '*.magnetictraps.com',
	 '*.magseps.com',
	 '*.panfeeders.com',
	 '*.plate-magnets.com',
	 '*.platemagnets.com',
	 '*.rareearthdrum.com',
	 '*.rareearthroll.com',
	 '*.suspendedmagnets.com',
	 '*.vibratory-feeder.com',
	 '*.wetdrum.com',
	 '*.hydroflowinc.com',
	 '*.hydroflowfiltrationsystems.com',
	 '*.hydroflowsystems.com',
	 '*.hydroflow-systems.com',
	 '*.hydroflowsystemsllc.com',
	 'flotation.eriez.com',
	 'www.flotation.eriez.com',
	 'hydroflow.eriez.com',
	 'eriez.com/hydroflow',
	 'eriez.com/filtration'
	];

function subDomains()
{
    // Get all the links on the page (could be slow for pages with lots of links)
    var links = document.getElementsByTagName("a");
    // Loop through links
    for(i=0;i<links.length;i++) {
	    // Get the target for link
	    var link_target = links[i].host;
	    // Loop through domains to track
	    for (j=0;j<domains_to_track.length;j++) {
		    var wildcard_domain = -1;
		    // Check for wildcard domain (e.g. *.somedomain.com)
		    if (domains_to_track[j].substr(0,1)=='*') {
			    wildcard_domain = domains_to_track[j].substr(2,(domains_to_track[j].length-1));
		    }
		    // Checks if domain should be tracked
		    if(link_target==domains_to_track[j]||
		       link_target==domains_to_track[j]+':80'||
		       link_target.indexOf(wildcard_domain)>=0) {
               links[i].onclick = 
				    function() {
					    // Run tagLink function when link is clicked
					    return tagLink(this.href);
				    }
		    }
	    }
    }
}
// This function is called when a tracked link is clicked
function tagLink(link_href) {
	// Check if pageTracker or urchinTracker are present
	if (typeof pageTracker != 'undefined') {
		pageTracker._link(link_href);
		return false;
	}
	else if (typeof urchinTracker != 'undefined') {
		__utmLinker(link_href);
		return false;
	}
	else {
		return true;
	}
}