Плагин maskedinput

!function(factory) { 
    "function" == typeof define && define.amd ? define([ "jquery" ], factory) : factory("object" == typeof exports ? require("jquery") : jQuery); 
}(function($) { 
    var caretTimeoutId, ua = navigator.userAgent, iPhone = /iphone/i.test(ua), chrome = /chrome/i.test(ua), android = /android/i.test(ua); 
    $.mask = { 
        definitions: { 
            "9": "[0-9]", 
            a: "[A-Za-z]", 
            "*": "[A-Za-z0-9]" 
        }, 
        autoclear: !0, 
        dataName: "rawMaskFn", 
        placeholder: "_" 
    }, $.fn.extend({ 
        caret: function(begin, end) { 
            var range; 
            if (0 !== this.length && !this.is(":hidden")) return "number" == typeof begin ? (end = "number" == typeof end ? end : begin,  
            this.each(function() { 
                this.setSelectionRange ? this.setSelectionRange(begin, end) : this.createTextRange && (range = this.createTextRange(),  
                range.collapse(!0), range.moveEnd("character", end), range.moveStart("character", begin),  
                range.select()); 
            })) : (this[0].setSelectionRange ? (begin = this[0].selectionStart, end = this[0].selectionEnd) : document.selection && document.selection.createRange && (range = document.selection.createRange(),  
            begin = 0 - range.duplicate().moveStart("character", -1e5), end = begin + range.text.length),  
            { 
                begin: begin, 
                end: end 
            }); 
        }, 
        unmask: function() { 
            return this.trigger("unmask"); 
        }, 
        mask: function(mask, settings) { 
            var input, defs, tests, partialPosition, firstNonMaskPos, lastRequiredNonMaskPos, len, oldVal; 
            if (!mask && this.length > 0) { 
                input = $(this[0]); 
                var fn = input.data($.mask.dataName); 
                return fn ? fn() : void 0; 
            } 
            return settings = $.extend({ 
                autoclear: $.mask.autoclear, 
                placeholder: $.mask.placeholder, 
                completed: null 
            }, settings), defs = $.mask.definitions, tests = [], partialPosition = len = mask.length,  
            firstNonMaskPos = null, $.each(mask.split(""), function(i, c) { 
                "?" == c ? (len--, partialPosition = i) : defs[c] ? (tests.push(new RegExp(defs[c])),  
                null === firstNonMaskPos && (firstNonMaskPos = tests.length - 1), partialPosition > i && (lastRequiredNonMaskPos = tests.length - 1)) : tests.push(null); 
            }), this.trigger("unmask").each(function() { 
                function tryFireCompleted() { 
                    if (settings.completed) { 
                        for (var i = firstNonMaskPos; lastRequiredNonMaskPos >= i; i++) if (tests[i] && buffer[i] === getPlaceholder(i)) return; 
                        settings.completed.call(input); 
                    } 
                } 
                function getPlaceholder(i) { 
                    return settings.placeholder.charAt(i < settings.placeholder.length ? i : 0); 
                } 
                function seekNext(pos) { 
                    for (;++pos < len && !tests[pos]; ) ; 
                    return pos; 
                } 
                function seekPrev(pos) { 
                    for (;--pos >= 0 && !tests[pos]; ) ; 
                    return pos; 
                } 
                function shiftL(begin, end) { 
                    var i, j; 
                    if (!(0 > begin)) { 
                        for (i = begin, j = seekNext(end); len > i; i++) if (tests[i]) { 
                            if (!(len > j && tests[i].test(buffer[j]))) break; 
                            buffer[i] = buffer[j], buffer[j] = getPlaceholder(j), j = seekNext(j); 
                        } 
                        writeBuffer(), input.caret(Math.max(firstNonMaskPos, begin)); 
                    } 
                } 
                function shiftR(pos) { 
                    var i, c, j, t; 
                    for (i = pos, c = getPlaceholder(pos); len > i; i++) if (tests[i]) { 
                        if (j = seekNext(i), t = buffer[i], buffer[i] = c, !(len > j && tests[j].test(t))) break; 
                        c = t; 
                    } 
                } 
                function androidInputEvent() { 
                    var curVal = input.val(), pos = input.caret(); 
                    if (oldVal && oldVal.length && oldVal.length > curVal.length) { 
                        for (checkVal(!0); pos.begin > 0 && !tests[pos.begin - 1]; ) pos.begin--; 
                        if (0 === pos.begin) for (;pos.begin < firstNonMaskPos && !tests[pos.begin]; ) pos.begin++; 
                        input.caret(pos.begin, pos.begin); 
                    } else { 
                        for (checkVal(!0); pos.begin < len && !tests[pos.begin]; ) pos.begin++; 
                        input.caret(pos.begin, pos.begin); 
                    } 
                    tryFireCompleted(); 
                } 
                function blurEvent() { 
                    checkVal(), input.val() != focusText && input.change(); 
                } 
                function keydownEvent(e) { 
                    if (!input.prop("readonly")) { 
                        var pos, begin, end, k = e.which || e.keyCode; 
                        oldVal = input.val(), 8 === k || 46 === k || iPhone && 127 === k ? (pos = input.caret(),  
                        begin = pos.begin, end = pos.end, end - begin === 0 && (begin = 46 !== k ? seekPrev(begin) : end = seekNext(begin - 1),  
                        end = 46 === k ? seekNext(end) : end), clearBuffer(begin, end), shiftL(begin, end - 1),  
                        e.preventDefault()) : 13 === k ? blurEvent.call(this, e) : 27 === k && (input.val(focusText),  
                        input.caret(0, checkVal()), e.preventDefault()); 
                    } 
                } 
                function keypressEvent(e) { 
                    if (!input.prop("readonly")) { 
                        var p, c, next, k = e.which || e.keyCode, pos = input.caret(); 
                        if (!(e.ctrlKey || e.altKey || e.metaKey || 32 > k) && k && 13 !== k) { 
                            if (pos.end - pos.begin !== 0 && (clearBuffer(pos.begin, pos.end), shiftL(pos.begin, pos.end - 1)),  
                            p = seekNext(pos.begin - 1), len > p && (c = String.fromCharCode(k), tests[p].test(c))) { 
                                if (shiftR(p), buffer[p] = c, writeBuffer(), next = seekNext(p), android) { 
                                    var proxy = function() { 
                                        $.proxy($.fn.caret, input, next)(); 
                                    }; 
                                    setTimeout(proxy, 0); 
                                } else input.caret(next); 
                                pos.begin <= lastRequiredNonMaskPos && tryFireCompleted(); 
                            } 
                            e.preventDefault(); 
                        } 
                    } 
                } 
                function clearBuffer(start, end) { 
                    var i; 
                    for (i = start; end > i && len > i; i++) tests[i] && (buffer[i] = getPlaceholder(i)); 
                } 
                function writeBuffer() { 
                    input.val(buffer.join("")); 
                } 
                function checkVal(allow) { 
                    var i, c, pos, test = input.val(), lastMatch = -1; 
                    for (i = 0, pos = 0; len > i; i++) if (tests[i]) { 
                        for (buffer[i] = getPlaceholder(i); pos++ < test.length; ) if (c = test.charAt(pos - 1),  
                        tests[i].test(c)) { 
                            buffer[i] = c, lastMatch = i; 
                            break; 
                        } 
                        if (pos > test.length) { 
                            clearBuffer(i + 1, len); 
                            break; 
                        } 
                    } else buffer[i] === test.charAt(pos) && pos++, partialPosition > i && (lastMatch = i); 
                    return allow ? writeBuffer() : partialPosition > lastMatch + 1 ? settings.autoclear || buffer.join("") === defaultBuffer ? (input.val() && input.val(""),  
                    clearBuffer(0, len)) : writeBuffer() : (writeBuffer(), input.val(input.val().substring(0, lastMatch + 1))),  
                    partialPosition ? i : firstNonMaskPos; 
                } 
                var input = $(this), buffer = $.map(mask.split(""), function(c, i) { 
                    return "?" != c ? defs[c] ? getPlaceholder(i) : c : void 0; 
                }), defaultBuffer = buffer.join(""), focusText = input.val(); 
                input.data($.mask.dataName, function() { 
                    return $.map(buffer, function(c, i) { 
                        return tests[i] && c != getPlaceholder(i) ? c : null; 
                    }).join(""); 
                }), input.one("unmask", function() { 
                    input.off(".mask").removeData($.mask.dataName); 
                }).on("focus.mask", function() { 
                    if (!input.prop("readonly")) { 
                        clearTimeout(caretTimeoutId); 
                        var pos; 
                        focusText = input.val(), pos = checkVal(), caretTimeoutId = setTimeout(function() { 
                            input.get(0) === document.activeElement && (writeBuffer(), pos == mask.replace("?", "").length ? input.caret(0, pos) : input.caret(pos)); 
                        }, 10); 
                    } 
                }).on("blur.mask", blurEvent).on("keydown.mask", keydownEvent).on("keypress.mask", keypressEvent).on("input.mask paste.mask", function() { 
                    input.prop("readonly") || setTimeout(function() { 
                        var pos = checkVal(!0); 
                        input.caret(pos), tryFireCompleted(); 
                    }, 0); 
                }), chrome && android && input.off("input.mask").on("input.mask", androidInputEvent),  
                checkVal(); 
            }); 
        } 
    }); 
}); 
	$("#phone").mask("+(999) 999-99-99",{autoclear: false}); 
    $('#phone').one('mousedown', function(){ 
 		 $("#phone").val(375); 
	});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
<input id="phone">