jQuery.fn.extend({getUrlParam:function(f){f=escape(unescape(f));var e=new Array();var b=null;if($(this).attr("nodeName")=="#document"){if(window.location.search.search(f)>-1){b=window.location.search.substr(1,window.location.search.length).split("&")}}else{if($(this).attr("src")!="undefined"){var d=$(this).attr("src");if(d.indexOf("?")>-1){var a=d.substr(d.indexOf("?")+1);b=a.split("&")}}else{if($(this).attr("href")!="undefined"){var d=$(this).attr("href");if(d.indexOf("?")>-1){var a=d.substr(d.indexOf("?")+1);b=a.split("&")}}else{return null}}}if(b==null){return null}for(var c=0;c<b.length;c++){if(escape(unescape(b[c].split("=")[0]))==f){e.push(b[c].split("=")[1])}}if(e.length==0){return null}else{if(e.length==1){return e[0]}else{return e}}}});