//limit textarea to 200 chars. call onKeyUp.

var MAX_LENGTH=200;

/**
* limitTextAreaLength - pass id of textarea. count of elapsed chars is displayed in div with id= "state_"+text_area_id
*/

function limitTextAreaLength(text_area_id, max_l){
	
	var limit = MAX_LENGTH;
	
	if(max_l)
		limit = max_l;
	
	var ta_element= document.getElementById(text_area_id);
	var ta_state_element = document.getElementById("state_"+text_area_id);
	//
	var value = ta_element .value;
	var length = value.length;
	
	if( length >= limit){
		ta_element.value = value.substring(0, limit);
		//ta_element.disabled=true;
		ta_state_element.innerHTML = "(restliche Zeichen: 0)";
	}
	else
		ta_state_element.innerHTML = "(restliche Zeichen: "+(limit - length)+")";	
}