//限制只能输入数字
$.fn.numeral = function () {
    $(this).css("ime-mode", "disabled");
    this.bind("keypress", function () {
        if (event.keyCode == 46) {
            if (this.value.indexOf(".") != -1) {
                return false;
            }
        } else {
            return event.keyCode >= 46 && event.keyCode <= 57;
        }
    });
    this.bind("blur", function () {
        if (this.value.lastIndexOf(".") == (this.value.length - 1)) {
            this.value = this.value.substr(0, this.value.length - 1);
        } else if (isNaN(this.value)) {
            this.value = "";
        }
    });
    this.bind("paste", function () {
        var s = clipboardData.getData('text');
        if (!/\D/.test(s));
        value = s.replace(/^0*/, '');
        return false;
    });
    this.bind("dragenter", function () {
        return false;
    });
    this.bind("keyup", function () {
        if (/(^0+)/.test(this.value)) {
            this.value = this.value.replace(/^0*/, '');
        }
    });
};

//浮点数相加,解决出现本来结果应该是1.4相加后却成为1.4000000000006之类的情况
function FloatAdd(arg1, arg2) {
    var r1, r2, m;
    try {
        r1 = arg1.toString().split(".")[1].length;
    } catch (e) {
        r1 = 0;
    }
    try {
        r2 = arg2.toString().split(".")[1].length;
    } catch (e) {
        r2 = 0;
    }
    m = Math.pow(10, Math.max(r1, r2));
    return (arg1 * m + arg2 * m) / m;
}