(function($) { $.fn.extend({ limit: function(limit, element) { var interval, f; var self = $(this); $(this).focus(function() { interval = window.setInterval(substring, 100) }); $(this).blur(function() { clearInterval(interval); substring() }); substringFunction = "function substring(){ var val = $(self).val();var length = val.length;if(length+lineBreakCount(val) > limit){$(self).val($(self).val().substring(0,limit));}"; if (typeof element != 'undefined') substringFunction += "if($(element).html() != limit-length){$(element).html((limit-length<=0)?'0':limit-length);}"; substringFunction += "}"; eval(substringFunction); substring() } }) })(jQuery);
function lineBreakCount(str) {
	try {
		return ((str.match(/[^\n]*\n[^\n]*/gi).length))*4;
	} catch (e) {
		return 0;
	}
}