Help needed in truncating links

[litewarez]

function truncate(string)
{
    var patcher = ".......";
    if(string.length > (30+ patcher.length))
    {
         firstSegment = ((string.length/2)-patcher.length);
         lastSegment = (string.length-patcher.length);
         return string.substr(0,firstSegment) + patcher + string.substr(lastSegment,30);
    }
    return string;
}
alert(truncate("some ling ass text string. cossdjgsinuhguynuadgfudkyfgsydfnsydjfhsdfgsfdgkgh ieurhg iuedhg uaegh uaergh aeuihfg ioah laergm")); 

Shows some ling ass text string. cossdjgsinuhguynuadgfudkyfg....... laergm

http://jsfiddle.net/7GHzm/1/