/*

Injects Google Page Tracker for document types in docTypeToSearch array on "onclick" event

Note : you need to have Google

*/
function injectTracker(){
    
    // filter all the 'a' elements, which have links 
    // ending with elements in docTypeToSearch array
    var myArr = $("a").filter(
        function(index)
        { 
            var href = $(this).attr("href");
            var lastFourChars = href.substr(href.length-4,4);
            var docTypeToSearch = [ 
			".doc",".pdf",".xls",".ppt",".flv", ".mp3", 
			".wav",".mp2",".mpeg",".mpg",".mp4",".aiff", 
			".riff", ".wma",".wmv",".ra",".ram",".asf",
			".asx",".amv",".m4a" 
		];
            return(
                jQuery.inArray(lastFourChars, docTypeToSearch)>-1
            );
        }
    );
    
    for(i=0;i<myArr.length;i++)
    {
        $(myArr[i]).one("click",function(){
            pageTracker._trackPageview($(this).attr("href"));
            //alert($(this).attr("href"));
            //return true;
        });
    }
}