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);
        }
},
'input': 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).innerHTML = 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;
            }
        }
    }
}