JQuery 限制文本输入只能输入数字（可自定义正则表达式）

var JVerify ={
    role: { number: /[0-9/]/, decimal: /[0-9./]/, code: /[0-9A-Z]/},
    Verify: function() {
        for (var prop inJVerify.role) {
            $("[role^='" + prop + "']").each(function() {
                var obj = $(this);
                var values = obj.attr("role").split("-");
                var length = 16;
                if (values.length > 1) {
                    length = values[1];
                }
                obj.attr("maxlength", length);
                obj.bind("input propertychange", function() {
                    var input = $(this);
                    var text =input.val();
                    input.val("");
                    var content = "";
                    var attr = $(this).attr("role");
                    var regex = JVerify.role[values[0]];
                    var isDot = false;
                    var array = attr.split("-");
                    var number =length;
                    if (array.length == 3) {
                        number = Number(array[2]);
                    }
                    for (var i = 0, index = 0; i < text.length; i++) {
                        if (text[0] == ".") {
                            continue;
                        }
                        if (text[i] == ".") {
                            if (isDot == false) {
                                content += ".";
                                isDot = true;
                                index =i;
                            }
                            continue;
                        }
                        if ((i - 0 == 1 && text[0] == "0" && text[i] == "0") || isDot && (index + number <i)) {
                            continue;
                        }
                        if(regex.test(text[i])) {
                            content +=text[i];
                        }
                    }
                    input.val(content);
                }).blur(function() {
                    var value = $(this).val();
                    if (value[value.length - 1] === ".") {
                        $(this).val(value.substr(0, value.length - 1));
                    }
                });
            })
        }
    }
}

<input role="decimal-6-1"type="text" />

JVerify.Verify();

JVerify.role.myRegex = /[a-z]/;