[jQuery] .length doesn't work in Firefox

[vladv]

Hello,
Have some strange behavior with Firefox, can someone please help me
with this?

This is the code (without irrelevant info):

var content = $('#TextField'); //this is ASP.NET TextField
var len = content.html().length; //same result with text()

if(len == 0)
{
   return false;
}
else
{
   return true;
}

It works great in IE (6 and 7) but in Firefox gives me always len==0
(even if there is some text there)

I use jQuery 1.2.6