var CSSrules = {
	'textarea' : function(element){
			element.onkeydown = function(event){
				return doKeyPress(element,event);
			}
			,
			element.onpaste = function(){
				return doPaste(element);
			}
			,
			element.onkeyup = function(){
				return doKeyUp(element);
			}
			,
			element.onblur = function(){
				return doKeyUp(element);
			}
	}
}

Behaviour.register(CSSrules);

var detect = navigator.userAgent.toLowerCase();

// Keep user from entering more than maxLength characters
function doKeyPress(obj,evt){
	maxLength = obj.getAttribute("maxlength");
	var e = window.event ? event.keyCode : evt.which;
	if ( (e == 32) || (e == 13) || (e > 47)) { //IE
		if(maxLength && (obj.value.length > maxLength-1)) {
			if (window.event) {
				window.event.returnValue = null;
			} else {
				evt.cancelDefault;
				return false;
			}
		}
	}
}
function doKeyUp(obj){
	maxLength = obj.getAttribute("maxlength");
     if(maxLength && obj.value.length > maxLength){
           obj.value = obj.value.substr(0,maxLength);
	 }
	sr = obj.getAttribute("showremain");
	if (sr) {
		document.getElementById(sr).innerText = maxLength-obj.value.length;
	}
}

// Cancel default behavior and create a new paste routine
function doPaste(obj){
maxLength = obj.getAttribute("maxlength");
     if(maxLength){
		if ((window.event) && (detect.indexOf("safari") + 1 == 0)) { //IE
          var oTR = obj.document.selection.createRange();
          var iInsertLength = maxLength - obj.value.length + oTR.text.length;
		  try {
          var sData = window.clipboardData.getData("Text").substr(0,iInsertLength);
          oTR.text = sData;
		  }
		  catch (err) {
		  }
          if (window.event) { //IE
			window.event.returnValue = null;
	 } else {
			//not IE
            obj.value = obj.value.substr(0,maxLength);
			return false;
		}
		}
	 }
}