(function(jQuery){jQuery.fn.extend({elastic:function(){var mimics=["paddingTop","paddingRight","paddingBottom","paddingLeft","fontSize","lineHeight","fontFamily","width","fontWeight"];return this.each(function(){if(this.type!="textarea"){return false}var $textarea=jQuery(this),$twin=jQuery("<div />").css({position:"absolute",display:"none","word-wrap":"break-word"}),lineHeight=parseInt($textarea.css("line-height"),10)||parseInt($textarea.css("font-size"),"10"),minheight=parseInt($textarea.css("height"),10)||lineHeight*3,maxheight=parseInt($textarea.css("max-height"),10)||Number.MAX_VALUE,goalheight=0,i=0;if(maxheight<0){maxheight=Number.MAX_VALUE}$twin.appendTo($textarea.parent());var i=mimics.length;while(i--){$twin.css(mimics[i].toString(),$textarea.css(mimics[i].toString()))}function setHeightAndOverflow(height,overflow){curratedHeight=Math.floor(parseInt(height,10));if($textarea.height()!=curratedHeight){$textarea.css({height:curratedHeight+"px",overflow:overflow})}}function update(){var textareaContent=$textarea.val().replace(/&/g,"&amp;").replace(/  /g,"&nbsp;").replace(/<|>/g,"&gt;").replace(/\n/g,"<br />");var twinContent=$twin.html();if(textareaContent+"&nbsp;"!=twinContent){$twin.html(textareaContent+"&nbsp;");if(Math.abs($twin.height()+lineHeight-$textarea.height())>3){var goalheight=$twin.height()+lineHeight;if(goalheight>=maxheight){setHeightAndOverflow(maxheight,"auto")}else{if(goalheight<=minheight){setHeightAndOverflow(minheight,"hidden")}else{setHeightAndOverflow(goalheight,"hidden")}}}}}$textarea.css({overflow:"hidden"});$textarea.keyup(function(){update()});$textarea.live("input paste",function(e){setTimeout(update,250)});update()})}})})(jQuery);