Question

I have created a example here:
http://jsfiddle.net/zidski/TFBqf/7/

This is not working:

var a = $("#content div:empty").html("").css("background","red");

if(a) {
    $("#link").hide;
}else{
    $("#link").show;
    return;
}

Answer 1

Here is: http://jsfiddle.net/TFBqf/18/

try to remove text in div to check it

var a = $("#content div").html("");

if(a.length == 0) {
    $("#link").hide();
}