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var vs_IsInitialized = false;
var vs_IsHoverActive = false;

function vs_ensureEmbedContainer(guid) {
	var c = jQuery('#'+guid);
	if(!c || c.length == 0) {
		c = jQuery('<div>').attr('id', guid).addClass('vs_embed_container');
		jQuery('body').append(c);
	}
	return c;
}

function vs_showEmbedCallback(guid) {	
	var docW = jQuery(document).width();
	var c = vs_ensureEmbedContainer(guid);
	var link = linkCache[guid];
	link.bind('mouseenter', function(e) { vs_stopHideTimer(guid); });
	link.bind('mouseleave', function(e) { vs_startHideTimer(guid); });
	setOffset(link, c);

	html = "<div class='vs-footer vs_link'><img src='http://rexee-00.vo.llnwd.net/d1/application/images/favicon_v2.gif'>Video links enhanced by VideoSurf.  <a href='http://www.videosurf.com/tools/video-link-enhancer' target='_blank'>Enable this on your site</a>. </div>";
	c.html(embedCache[guid].embed_code + html);
	c.bind('mouseenter', function(e) { vs_stopHideTimer(guid); });
	c.bind('mouseleave', function(e) { vs_startHideTimer(guid); });

	var offset = c.offset();
	if(offset.left + c.width() > docW) {
		c.css({left: docW - c.width() - 50});
	}
}

var embedCache = {}
var linkCache = {}
var timeouts = {}
var currHoverTO = null;
function vs_showEmbed(e) {
	if(!vs_IsHoverActive) {
		return;
	}
		
	var link = jQuery(e.target);
	while(link.attr('tagName') != "A") {
		link = link.parent()
	}
	var guid = link.attr('guid');
	var c = vs_ensureEmbedContainer(guid);	

	if(c.html() == "") {
		vs_showEmbedCallback(guid);
	}
	currHoverTO = setTimeout(function() { vs_reallyShowEmbed(guid);  }, 500);
}

function vs_startHideTimer(guid, t) {
	if(t == null) { t = 500; }
	timeouts[guid] = setTimeout(function() { vs_hideEmbed(guid); }, t);	
}

function vs_stopHideTimer(guid) {
	clearTimeout(timeouts[guid]);
}

function vs_reallyShowEmbed(guid) {
	var c = vs_ensureEmbedContainer(guid);	
	c.css({'visibility': 'visible'});
}

function vs_hideEmbed(guid) {
	var c = vs_ensureEmbedContainer(guid);
	c.css({'visibility': 'hidden'});
	jQuery('body').focus();
}

function setOffset(link, c) {
	var offset = link.offset();
	var l = offset.left + 11;
	var t = offset.top + 19;
	c.css({left: l, top: t});
}

function vs_ajaxCallback(json) {
	for(i = 0 ; i < vs_enhanceableLinks.length; i++) {
		var link = vs_enhanceableLinks[i];
		for(j = 0 ; j < json.videos.length ; j++) {
			var video = json.videos[j];
			
			//console.log([video, video.embed_code, video.is_embeddable, !video.should_open_externally, (link.href.indexOf(video.source_video_id) >= 0 || (link.href.indexOf("videosurf.com") >= 0 && link.href.indexOf(video.video_id) >= 0))]);
			
			if(video.embed_code && video.is_embeddable && !video.should_open_externally && (link.href.indexOf(video.source_video_id) >= 0 || (link.href.indexOf("videosurf.com") >= 0 && link.href.indexOf(video.video_id) >= 0))) {
				link = jQuery(link);
				var marginBottom = Math.abs(link.height() - 10) / 2;
				link.prepend(jQuery('<img>').attr('src', 'http://rexee-00.vo.llnwd.net/d1/application/images/favicon_v2_10x10.gif').attr('class', 'vs_image').css({'margin-bottom': marginBottom})).addClass('vs_link');
				link.bind('mouseenter', vs_showEmbed);
				link.bind('mouseleave', function() { clearTimeout(currHoverTO); });
				link.attr('vs_id', video.video_id);
				var guid = "vs_link_"+i+j;
				link.attr('guid', guid);
				linkCache[guid] = link;
				embedCache[guid] = {'embed_code': video['embed_code'], 'embed_width': video['embed_width'], 'embed_height': video['embed_height']};
				break;
			}
		}
	}
	
	vs_IsInitialized = true;
	vs_IsHoverActive = true;
}

function vs_ready() {
    
	for(var siteID in vs_video_domains) {		
		for(var regularExpressionIndex in vs_video_domains[siteID]['expressions']) {
			vs_video_domains[siteID]['expressions'][regularExpressionIndex]['regexp'] = new RegExp(
				vs_video_domains[siteID]['expressions'][regularExpressionIndex]['regexp'].substr(1, vs_video_domains[siteID]['expressions'][regularExpressionIndex]['regexp'].length -2)
			);
		}
	}
	        
	jQuery('head').append('<style>'+vs_css+'</style>');
	var links = jQuery('a');
	var urlString = "";
	var idString = "";
	links.each(function() {
		if(vs_isVideoUrl(this.href)) {
			vs_enhanceableLinks[vs_enhanceableLinks.length] = this;
			if(this.href.indexOf("videosurf.com") >= 0) {
				parts = this.href.split("-");
				idString += parts[parts.length - 1].split("?")[0]+",";
			} else {
				urlString += this.href+"||";
			}
		}
	});

	var ajaxUrl = "http://apis.videosurf.com/video_lookup/v1.1/?urls="+encodeURIComponent(urlString)+"&ids="+idString+"&client_id=vs_embed_enhance_js&client_key=132696626e0210218109a43749896cae&callback=vs_ajaxCallback";
	vs_loadjscssfile(ajaxUrl, "js", "head");	
}

//GO!
vs_ensureJQuery(vs_ready);


function vs_start() {
	if(vs_IsInitialized) {
		jQuery('.vs_image').show();
		vs_IsHoverActive = true;
	}
	else {
		vs_ensureJQuery(vs_ready);
	}
}

function vs_stop() {
	if(vs_IsInitialized) {
		jQuery('.vs_image').hide();
		vs_IsHoverActive = false;
	}
}

/* Utility Fns */
/* Utility Fns */
/* Utility Fns */

function vs_isVideoUrl(urlToValidate) {
	url = cleanRedirectURL(urlToValidate.toLowerCase());

	var parts = parse_url(url);
	
	try {
		var host  = explode('.', parts.host.replace(/\.go\./, 'go.'));
		var p     = host.length;
	
		for(var i = p - 2; i >= 0 && p[i] != 'www'; i--) {
			if(vs_video_domains[host[i]]) {
				for(var j = 0; j < vs_video_domains[host[i]]['expressions'].length; j++) {				
					if(vs_video_domains[host[i]]['expressions'][j]['regexp'].test(url)) {
						return true;
					}
				}
			}
		}
	}
	catch(e) {}

	return false;
}

function cleanRedirectURL(urlString) {
	if(substr_count(urlString, 'http') > 1) {
		var url = explode('http', urlString);
		var knownRedirectors = [
			'google',
			'yahoo'
		];
		
		for(var index in knownRedirectors) {		
			if(substr_count(url[1], knownRedirectors[index]) > 0) {
				return 'http' + urldecode(url[2]);				
			}
		}
	}

	return urlString;
}

function parse_url(str, component) {
	return {host:explode('/', str)[2]};
}

function substr_count(haystack, needle, offset, length) {
    // Returns the number of times a substring occurs in the string  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/substr_count
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   bugfixed by: Onno Marsman
    // *     example 1: substr_count('Kevin van Zonneveld', 'e');
    // *     returns 1: 3
    // *     example 2: substr_count('Kevin van Zonneveld', 'K', 1);
    // *     returns 2: 0
    // *     example 3: substr_count('Kevin van Zonneveld', 'Z', 0, 10);
    // *     returns 3: false
    var pos = 0, cnt = 0;

    haystack += '';
    needle += '';
    if (isNaN(offset)) {offset = 0;}
    if (isNaN(length)) {length = 0;}
    offset--;

    while ((offset = haystack.indexOf(needle, offset+1)) != -1){
        if (length > 0 && (offset+needle.length) > length){
            return false;
        } else{
            cnt++;
        }
    }

    return cnt;
}

function explode(delimiter, string, limit) {
    return string.split(delimiter);
}

function urldecode(str) {
    // Decodes URL-encoded string  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/urldecode
    // +   original by: Philip Peterson
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: AJ
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +      input by: travc
    // +      input by: Brett Zamir (http://brett-zamir.me)
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Lars Fischer
    // +      input by: Ratheous
    // +   improved by: Orlando
    // %        note 1: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
    // *     example 1: urldecode('Kevin+van+Zonneveld%21');
    // *     returns 1: 'Kevin van Zonneveld!'
    // *     example 2: urldecode('http%3A%2F%2Fkevin.vanzonneveld.net%2F');
    // *     returns 2: 'http://kevin.vanzonneveld.net/'
    // *     example 3: urldecode('http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a');
    // *     returns 3: 'http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a'

    var hash_map = {}, ret = str.toString(), unicodeStr='', hexEscStr='';

    var replacer = function (search, replace, str) {
        var tmp_arr = [];
        tmp_arr = str.split(search);
        return tmp_arr.join(replace);
    };

    // The hash_map is identical to the one in urlencode.
    hash_map["'"]   = '%27';
    hash_map['(']   = '%28';
    hash_map[')']   = '%29';
    hash_map['*']   = '%2A';
    hash_map['~']   = '%7E';
    hash_map['!']   = '%21';
    hash_map['%20'] = '+';
    hash_map['\u00DC'] = '%DC';
    hash_map['\u00FC'] = '%FC';
    hash_map['\u00C4'] = '%D4';
    hash_map['\u00E4'] = '%E4';
    hash_map['\u00D6'] = '%D6';
    hash_map['\u00F6'] = '%F6';
    hash_map['\u00DF'] = '%DF';
    hash_map['\u20AC'] = '%80';
    hash_map['\u0081'] = '%81';
    hash_map['\u201A'] = '%82';
    hash_map['\u0192'] = '%83';
    hash_map['\u201E'] = '%84';
    hash_map['\u2026'] = '%85';
    hash_map['\u2020'] = '%86';
    hash_map['\u2021'] = '%87';
    hash_map['\u02C6'] = '%88';
    hash_map['\u2030'] = '%89';
    hash_map['\u0160'] = '%8A';
    hash_map['\u2039'] = '%8B';
    hash_map['\u0152'] = '%8C';
    hash_map['\u008D'] = '%8D';
    hash_map['\u017D'] = '%8E';
    hash_map['\u008F'] = '%8F';
    hash_map['\u0090'] = '%90';
    hash_map['\u2018'] = '%91';
    hash_map['\u2019'] = '%92';
    hash_map['\u201C'] = '%93';
    hash_map['\u201D'] = '%94';
    hash_map['\u2022'] = '%95';
    hash_map['\u2013'] = '%96';
    hash_map['\u2014'] = '%97';
    hash_map['\u02DC'] = '%98';
    hash_map['\u2122'] = '%99';
    hash_map['\u0161'] = '%9A';
    hash_map['\u203A'] = '%9B';
    hash_map['\u0153'] = '%9C';
    hash_map['\u009D'] = '%9D';
    hash_map['\u017E'] = '%9E';
    hash_map['\u0178'] = '%9F';
    hash_map['\u00C6'] = '%C3%86';
    hash_map['\u00D8'] = '%C3%98';
    hash_map['\u00C5'] = '%C3%85';

    for (unicodeStr in hash_map) {
        hexEscStr = hash_map[unicodeStr]; // Switch order when decoding
        ret = replacer(hexEscStr, unicodeStr, ret); // Custom replace. No regexing
    }

    // End with decodeURIComponent, which most resembles PHP's encoding functions
    ret = decodeURIComponent(ret);

    return ret;
}


var jqueryTimeout = null;
function vs_ensureJQuery(callback) {
	if (typeof jQuery == "function") {
		if(jqueryTimeout != null) {
			jQuery.noConflict();
		}
		clearTimeout(jqueryTimeout);
		callback();
	} else {
		if(jqueryTimeout == null) {
			vs_loadjscssfile("http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js","js","head");
		}
		jqueryTimeout = setTimeout(function() { vs_ensureJQuery(callback); },200);
	}
}


//Thanks for this one Wibiya!  
function vs_loadjscssfile(filename, filetype, where){
	if (filetype=="js"){ //if filename is a external JavaScript file
		var fileref=document.createElement("script")
		fileref.setAttribute("type","text/javascript")
		fileref.setAttribute("onload","")
		fileref.setAttribute("onreadystatechange","")
		fileref.setAttribute("src", filename)
	} else if (filetype=="css"){ //if filename is an external CSS file
		var fileref=document.createElement("link")
		fileref.setAttribute("rel", "stylesheet")
		fileref.setAttribute("type", "text/css")
		fileref.setAttribute("href", filename)
	}

	if (typeof fileref!="undefined") {
		if (where=="head") {
		   	document.getElementsByTagName("head")[0].appendChild(fileref);
		}
		else
		{
			document.getElementsByTagName("body")[0].appendChild(fileref);
		}
	}
}