function loadContent(url){
    $.ajax({
        type: "GET",
        url: url,
        success: function(returnValue) {
            $('#col1_content').html($(returnValue).find("#col1_content").children());
            $('#col3_content').html($(returnValue).find("#col3_content").children());
            _gaq.push(['_trackPageview',url]);
        },
        error: function(returnValue) {
            alert("Something's wrong");
        }
    });
}
$(document).ready(function() {
    
    $("a.blog, a.imp, a.cat").live("click", function(){
        loadContent($(this).attr("href"))
        return false;
    });
});