function t_throttle(fn,threshhold,scope){var last;var deferTimer;threshhold||(threshhold=250);return function(){var context=scope||this;var now=+new Date();var args=arguments;if(last&&now<last+threshhold){clearTimeout(deferTimer);deferTimer=setTimeout(function(){last=now;fn.apply(context,args)},threshhold)}else{last=now;fn.apply(context,args)}}}