// Keep user from entering more than maxLength characters 
var detect = navigator.userAgent.toLowerCase();

// Keep user from entering more than maxLength characters
function doKeyPress(evt,obj){
    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);
    }
} 

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;
            }
        }
    }
}