//监听键盘输入是否为数字
function MouseDownCheckNumber(evt, object) {
    var length = object.value.length;
    var textvalue = object.value;
    var c = evt.keyCode;

    var nlenselect;
    var nstart;
    var nend;

    var ch;
    var part;

    nlenselect = object.selectionEnd - object.selectionStart;
    nstart = object.selectionStart;
    nend = object.selectionEnd;

    if (nstart === undefined) {
        try {
            var rng;
            if (object.tagName.toLowerCase() == "textarea") { //TEXTAREA 
                rng = evt.srcElement.createTextRange();
                rng.moveToPoint(evt.x, evt.y);
            } else { //Text 
                rng = document.selection.createRange();
            }
            nlenselect = rng.text.length;
            rng.moveStart("character", -evt.srcElement.value.length);
            nend = rng.text.length;
            nstart = Math.max(0, nend - nlenselect);
        } catch (e) {
            throw new Error(10, "failed to get cursor position.")
        }
    }

    if (nlenselect > 0) {
        part = object.value.substring(nstart, object.selectionEnd);
    }
    else {
        part = "";
    }

    /*-- Control the "-" key----*/
    if (((c == 173 || c == 189 || c == 109) && !evt.shiftKey) || c == 229) {
        return false;
    }
        /*--- Control the dot key--*/
    else if ((c == 190 || c == 110) && !evt.shiftKey) {
        if (textvalue.indexOf('.') == -1) {
            if (length == 0) {
            }
            else if (nstart == 0) {
                if (part.length == 0 && textvalue.charCodeAt(0) != 45) {
                }
                else if (part.length != 0) {
                }
                else {
                    return false;
                }
            }
        }
        else {
            if (part.indexOf('.') != -1) {
            }
            else {
                return false;
            }
        }
    }
    else if ((c >= 35 && c <= 40) || c == 46 || c == 9) {
    }
        /* Control the Number Key*/
    else if (((evt.keyCode >= 48 && evt.keyCode <= 59) && !evt.shiftKey) || (c >= 96 && c <= 105)) {
        if (length == 0) {
        }
        else if (length != 0) {
            /* check the number length behind the dot*/
            var op = length - textvalue.indexOf('.');
            if (textvalue.indexOf('.') != -1) {
                if (part.length != 0) {
                }
                else if (nstart > textvalue.indexOf('.')) {
                    if (object.lengthbehinddot != null) {
                        if ((length - textvalue.indexOf('.')) > object.lengthbehinddot) {
                            return false;
                        }
                    }
                }
            }
            /* check ... */
            ch = textvalue.charCodeAt(0);

            if (nstart == 0 && part.length != 0) {
            }
            else if (nstart == 0 && ch == 45) { // -
                return false;
            }
        }
    }
        /* Open the Ctrl + C Copy Key*/
    else if ((evt.keyCode == 67 || evt.keyCode == 99) && evt.ctrlKey) {
    }
        /* Open the Ctrl + V Paste Key*/
    else if ((evt.keyCode == 86 || evt.keyCode == 118) && evt.ctrlKey) {
    }
        /* Open the Ctrl + Z Back Key*/
    else if ((evt.keyCode == 90 || evt.keyCode == 122) && evt.ctrlKey) {
    }
        /* Open the Esc Key*/
    else if (evt.keyCode == 27) {
    }
    else if ((evt.keyCode < 48 || evt.keyCode > 59) && evt.keyCode != 8 || evt.shiftKey) {
        return false;
    }
    return true;
}

//对输入框的输入类型控制
function InputControl(object) {
    object.mouseup(function () { return false; });
    object.keydown(function (evt) {
        var c = evt.which;
        if (c == 13) {
            tmp = $(this).attr("id");
            setTimeout(EnterFocus, 200);
            return false;
        }
        else {
            if (c != 9) {
                var b = MouseDownCheckNumber(evt, $(this)[0]);
                if (!b)
                    return false;
            }
        }

    });
}

function inputValueFormat(obj) {
    var curval =$.trim($.trim($(obj).val()));
    var floatvalue = parseFloat(curval);
    if (floatvalue <= 0 || isNaN(floatvalue) || curval == "")
        return false;
    else {
        $(obj).val(floatvalue);
        return true;
    }
}

function checkDate(obj) {
    var splarray = obj.split('/');
    if (splarray.length != 3) {
        return false;
    }
    else {
        /*
         * 不易判断多种语言环境下的不同顺序格式，例如 2021/9/13 与 9/13/2021
         * 
        var mm=parseInt(splarray[0]);
        var dd=parseInt(splarray[1]);
        var yyyy=parseInt(splarray[2]);
        if (mm > 0 && mm <= 12 && dd > 0 && dd <= 31 && yyyy >= 1900) {
            return true;
        } else {
            return false;
        }
        */
        var date = new Date(obj);
        if (isNaN(date.getTime())) {
            return;
        }
        if (date.getFullYear() < 1900) {
            return false;
        }
        return true;
    }
}