asp:CustomValidator error messages not showing up on chrome

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ASP.NET

Javascript

I am trying to set my custom error messages using ClientValidationFunction in javascript.The error messages shows up properly in IE8 but not in IE9 and chrome
My Validator

<asp:CustomValidator runat="server"  EnableClientScript="true" ID="cvLogMsg" ClientValidationFunction="user"></asp:CustomValidator>

Javascript function

function user(source, args) {
               var bool = false;
            var errorMessage = '';
            var oldpass = $find('txtOldPassword');
            var currpass = document.getElementById('oldpass');

            var newpass = $find('txtNewPassword');
            var confirmpass = $find('txtConfirmPassword');
            if (oldpass.get_value().length > 0) {
                $('#ELabel1').removeClass('lablelRed');
            }
            if (newpass.get_value().length > 0) {
                $('#ELabel2').removeClass('lablelRed');
            }
            if (confirmpass.get_value().length > 0) {
                $('#ELabel3').removeClass('lablelRed');
            }
            if (oldpass != null && oldpass.get_value().length > 0 || confirmpass != null && confirmpass.get_value().length > 0 || newpass != null && newpass.get_value().length > 0) {
                if (oldpass != null && oldpass.get_value().length == 0) {
                    bool = true;
                    if (document.getElementById('lblCurrentPassMsg') != null && document.getElementById('lblCurrentPassMsg').innerText) {
                        errorMessage = document.getElementById('lblCurrentPassMsg').innerText;
                        $('#ELabel1').addClass('lablelRed');
                    } 
                }
                 else if (confirmpass != null && confirmpass.get_value().length == 0) {
                        bool = true;
                        if (document.getElementById('lblConpassMsg') != null && document.getElementById('lblConpassMsg').innerText) {
                            errorMessage = document.getElementById('lblConpassMsg').innerText;
                            $('#ELabel3').addClass('lablelRed');
                        }
                    }
                }

         
            if (bool == true) {
                
                source.setAttribute("errormessage", errorMessage);
                         
                args.IsValid = false
            }
            else {
                args.IsValid = true
            } 
        }

above set 'errorMessage' doesn't shows up in IE9 and chrome it gives blank message.