function is_ascii(Str){for(i=0;i<Str.length;i++){charCode=Str.charCodeAt(i);if(charCode>127){return false;}}return true;}
(function($){$.fn.smsCounter=function(selector){doCount=function(){var text=$(this).val();if(is_ascii(text))limit=160;else limit=70;if(text.length>limit){if(is_ascii(text))limit=limit-7;else limit=limit-3;}diff=text.length%limit;left=limit-diff;count=((text.length-diff)/limit)+1;if(diff==0){left=0;count=count-1;}$(selector).html('('+count+') '+left);};this.keyup(doCount);this.keyup();}})(jQuery)