$.fn.extend({
	positionCursor:function(value){
		var elem = this[0];
		if (elem&&(elem.tagName=="TEXTAREA"||elem.type.toLowerCase()=="text")) {
		   if($.browser.msie){
//				   var rng;
//				   if(elem.tagName == "TEXTAREA"){ 
//					    rng = event.srcElement.createTextRange();
//					    rng.moveToPoint(event.x,event.y);
//				   }else{ 
//				    	rng = document.selection.createRange();
//				   }
//				   if( value === undefined ){
//				   	 rng.moveStart("character",-event.srcElement.value.length);
//				     return  rng.text.length;
//				   }else if(typeof value === "number" ){
//				   	 var index=this.position();
//					 index>value?( rng.moveEnd("character",value-index)):(rng.moveStart("character",value-index))
//					 rng.select();
//				   }
			}else{
				if( value === undefined ){
				   	 return elem.selectionStart;
				   }else if(typeof value === "number" ){
				   	 elem.selectionEnd = value;
   			         elem.selectionStart = value;
				   }
			}
		}else{
			if( value === undefined )
			   return undefined;
		}
	}
});