文本框只能输入特定内容如文本框只能输入数字

来源：互联网发布：nginx http2 server 编辑：程序博客网时间：2024/05/14 22:23

<!doctype html><html><head><meta charset="utf-8"><title>无标题文档</title></head><body><script type="text/javascript">function getEvent() {    if (document.all) {        return window.event;    }    func = getEvent.caller;    while (func != null) {        var arg0 = func.arguments[0];        if (arg0) {            if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {                return arg0;            }        }        func = func.caller;    }    return null;}function doit(){    var ev = getEvent();    var bool = query(ev.keyCode);    if (bool) {    return false;    }}function query(_val) {    var allow = monitor.number_a + "," + monitor.number_b + "," + monitor.backspace;    var rs = allow.split(",");    for (var i = 0; i < rs.length; i++) {        var val = Number(rs[i]);        if (_val == val) {            return false;        }    }    return true;}var monitor = {string:"81,87,69,82,84,89,85,73,79,80,65,83,68,70,71,72,74,75,76,90,88,67,86,66,78,77",number_a:"48,49,50,51,52,53,54,55,56,57",number_b:"96,97,98,99,100,101,102,103,104,105,",backspace:"8",/*退格*/spot:"190,110"/*点如（.）*/} </script><input type="text" id="txt" onkeydown="return doit()"></body></html>

以上尚未完善

/** * [digitOnly 文本框限制只能输入数字] * @param  {[type]} a [event] * onkeypress="digitOnly(event)" onkeyup="value=value.replace(/[^0-9]/g,'')" onchange="value=value.replace(/[^0-9]/g,'')" */function digitOnly(a) {    48 <= a.keyCode && 57 >= a.keyCode || 45 == a.keyCode || (a.returnValue = !1)}

过滤内容，可兼容

var ban = {    input: function (options) {        var settings = jQuery.extend({            this: null,            allow: keyboard.getMonitor.number_a + "," + keyboard.getMonitor.number_b + "," + keyboard.getMonitor.backspace,        }, options);        options = settings;        var ev = keyboard.getEvent();        console.log(ev.keyCode)        var bool = bool_result(ev.keyCode);        if (bool) {            return false;        }        function bool_result(_val) {            var allow = settings.allow;            var rs = allow.split(",");            for (var i = 0; i < rs.length; i++) {                var val = Number(rs[i]);                if (_val == val) {                    return false;                }            }            return true;        }    }}var keyboard = {    getEvent: function () {        if (document.all) {            return window.event;        }        func = getEvent.caller;        while (func != null) {            var arg0 = func.arguments[0];            if (arg0) {                if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {                    return arg0;                }            }            func = func.caller;        }        return null;    },    getMonitor: {        string: "81,87,69,82,84,89,85,73,79,80,65,83,68,70,71,72,74,75,76,90,88,67,86,66,78,77",        number_a: "48,49,50,51,52,53,54,55,56,57",        number_b: "96,97,98,99,100,101,102,103,104,105,",        backspace: "8",/*退格*/        spot: "190,110"/*点如（.）*/    }}

function baninput() {    $("input[data-tyle='number']").bind('keyup', function () {        var val = $(this).val();        $(this).val(val.replace(/[^0-9]/g, ''));    }).change(function () {        var val = $(this).val();        $(this).val(val.replace(/[^0-9]/g, ''));    });    var ev = getEvent();    var bool = bool_result(ev.keyCode);    if (bool) {        return false;    }    function bool_result(_val) {        var allow = "48,49,50,51,52,53,54,55,56,57,96,97,98,99,100,101,102,103,104,105,8";        var rs = allow.split(",");        for (var i = 0; i < rs.length; i++) {            var val = Number(rs[i]);            if (_val == val) {                return false;            }        }        return true;    }    function getEvent() {        if (document.all) {            return window.event;        }        func = getEvent.caller;        while (func != null) {            var arg0 = func.arguments[0];            if (arg0) {                if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) {                    return arg0;                }            }            func = func.caller;        }        return null;    }}

0 0