IE10 sending image button click coordinates with decimals (floating point values) causing a ParseInt32 FormatException

  <script language="javascript" type="text/javascript">
function x()
{
            // Patch fractional .x, .y form parameters for IE10.
            if (typeof (Sys) !== 'undefined' && Sys.Browser.agent === Sys.Browser.InternetExplorer && Sys.Browser.version === 10) {
                Sys.WebForms.PageRequestManager.getInstance()._onFormElementActive = function Sys$WebForms$PageRequestManager$_onFormElementActive(element, offsetX, offsetY) {
                    if (element.disabled) {
                        return;
                    }
                    this._activeElement = element;
                    this._postBackSettings = this._getPostBackSettings(element, element.name);
                    if (element.name) {
                        var tagName = element.tagName.toUpperCase();
                        if (tagName === 'INPUT') {
                            var type = element.type;
                            if (type === 'submit') {
                                this._additionalInput = encodeURIComponent(element.name) + '=' + encodeURIComponent(element.value);
                            }
                            else if (type === 'image') {
                                this._additionalInput = encodeURIComponent(element.name) + '.x=' + Math.floor(offsetX) + '&' + encodeURIComponent(element.name) + '.y=' + Math.floor(offsetY);
                            }
                        }
                        else if ((tagName === 'BUTTON') && (element.name.length !== 0) && (element.type === 'submit')) {
                            this._additionalInput = encodeURIComponent(element.name) + '=' + encodeURIComponent(element.value);
                        }
                    }
                };
            }
</script>