Function.prototype.bind=function(obj){var method=this,temp=function(){return method.apply(obj,arguments)};return(temp);};
Mods=function(){};
Mods.TextAreaControl=function(object){this.obj=object;this.obj.style['overflow']='hidden';this.originalHeight=this.obj.getStyle('height').toInt();var updater=this.update.bind(this);object.addEvent("focus",this.onFocus.bind(this));object.addEvent("blur",this.onBlur.bind(this));this.update();};
Mods.TextAreaControl.prototype={
obj:null,updating:false,autoGrow:false,originalHeight:null,shadowElement:null,increment:0,timer:null,lastLength:0,
setAutoGrow:function(autoGrow){this.autoGrow=autoGrow;this.createShadowElement();this.update();},
onUpdate:function(){if(this.autoGrow && this.lastLength!=this.obj.value.length){this.lastLength=this.obj.value.length;this.updateShadowElement();this.obj.style.height=Math.max(this.originalHeight,this.shadowElement.offsetHeight+this.increment)+'px';}},
beginUpdate:function(){if(this.updating) return false;this.updating=true;return true;},
endUpdate:function(){this.updating=false;},
update:function(){if(!this.beginUpdate()) return;this.onUpdate();this.endUpdate();},
createShadowElement:function(){if(this.shadowElement) return;this.shadowElement=document.createElement("div");this.shadowElement.style.position="absolute";this.shadowElement.style.top="-99999px";this.shadowElement.style.left="-99999px";document.body.appendChild(this.shadowElement);},
updateShadowElement:function(){
 if(this.shadowElement){
	text=this.obj.value+'<br />';
	this.shadowElement.innerHTML=text.toString().replace(/&/g,'&amp;').replace(/"/g,'&quot;').replace(/'/g,'&#039;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/\n/g,'<br />');
	var fontSize=this.getPXMetrics(this.obj.getStyle('font-size'),10);var lineHeight=this.obj.getStyle('line-height');
  if((/Opera/i.test(navigator.userAgent))) lineHeight=this.getPXMetrics(lineHeight,0)+3+'px';this.increment=fontSize+10;this.shadowElement.style['width']=this.obj.offsetWidth+'px';
	this.shadowElement.style['lineHeight']=lineHeight;this.shadowElement.style['fontSize']=this.obj.getStyle('font-size');this.shadowElement.style['fontFamily']=this.obj.getStyle('font-family');this.shadowElement.style['paddingLeft']=this.obj.getStyle('padding-left');
	this.shadowElement.style['paddingRight']=this.obj.getStyle('padding-right');
 }
},
onFocus:function(){this.timer=setInterval(this.update.bind(this),500);},
onBlur:function(){if(this.timer){clearInterval(this.timer);this.timer=null;}},
getPXMetrics:function(metric,defvalue){var metricBase=parseFloat(metric);if(isNaN(metricBase)) return defvalue!=null ? defvalue : metricBase;return /px/i.test(metric) ? metricBase : /pt/i.test(metric) ? 1.3333*metricBase : metricBase;}};

function txt_growup(elementid){
 var el=$(elementid);
 if(!el) alert("txt_growup():Element bulunamadi");
 if(el && !el._controlled){el._controlled=true;new Mods.TextAreaControl(el).setAutoGrow(true);return el.getStyle('height').toInt();}
};