限制文本控件输入数据格式

 // = 比如只能输入数字、字母、数字和字母

<script type="text/javascript">
    UM.getEditor('myEditor1')

    $(function () {

        // ----------------------------------------------------------------------
        // <summary>
        // 限制只能输入字母
        // </summary>
        // ----------------------------------------------------------------------
        $.fn.onlyAlpha = function () {
            $(this).keypress(function (event) {
                var eventObj = event || e;
                var keyCode = eventObj.keyCode || eventObj.which;
                if ((keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122))
                    return true;
                else
                    return false;
            }).focus(function () {
                this.style.imeMode = 'disabled';
            }).bind("paste", function () {
                var clipboard = window.clipboardData.getData("Text");
                if (/^[a-zA-Z]+$/.test(clipboard))
                    return true;
                else
                    return false;
            });
        };

        // ----------------------------------------------------------------------
        // <summary>
        // 限制只能输入数字
        // </summary>
        // ----------------------------------------------------------------------
        $.fn.onlyNum = function () {
            $(this).keypress(function (event) {
                var eventObj = event || e;
                var keyCode = eventObj.keyCode || eventObj.which;
                if ((keyCode >= 48 && keyCode <= 57))
                    return true;
                else
                    return false;
            }).focus(function () {
                //禁用输入法
                this.style.imeMode = 'disabled';
            }).bind("paste", function () {
                //获取剪切板的内容
                var clipboard = window.clipboardData.getData("Text");
                if (/^d+$/.test(clipboard))
                    return true;
                else
                    return false;
            });
        };

        // ----------------------------------------------------------------------
        // <summary>
        // 限制只能输入数字和字母
        // </summary>
        // ----------------------------------------------------------------------
        $.fn.onlyNumAlpha = function () {
            $(this).keypress(function (event) {
                var eventObj = event || e;
                var keyCode = eventObj.keyCode || eventObj.which;
                if ((keyCode >= 48 && keyCode <= 57) || (keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122))
                    return true;
                else
                    return false;
            }).focus(function () {
                this.style.imeMode = 'disabled';
            }).bind("paste", function () {
                var clipboard = window.clipboardData.getData("Text");
                if (/^(d|[a-zA-Z])+$/.test(clipboard))
                    return true;
                else
                    return false;
            });
        };

        // 限制使用了onlyNum类样式的控件只能输入数字
        $(".onlyNum").onlyNum();
        //限制使用了onlyAlpha类样式的控件只能输入字母
        $(".onlyAlpha").onlyAlpha();
        // 限制使用了onlyNumAlpha类样式的控件只能输入数字和字母
        $(".onlyNumAlpha").onlyNumAlpha();
    });
</script>