JS页面校验数字的正则 IT

输入纯数字
<input type="text"  id="costs" name="costs" onkeyup="checkNum(this)" lay-verify="required" class="layui-input" value="${object.costs}" >

window.checkNum = function (date) {
    var num=date.value;
    if(num!=0){
        var reg = /^(?!(0[0-9]{0,}$))[0-9]{1,}[.]{0,}[0-9]{0,}$/;
        if (reg.test(num)) {
            $("#totalAmount").val(total);
        }else{
            date.value="";
            layer.msg("请输入数字!", {icon: 0});
        }
    }
}
正整数正则校验

<input type="text"  id="costs" name="costs" onkeyup="checkNum(this)" lay-verify="required" class="layui-input" value="${object.costs}" >

window.checkNum = function (date) {
    var num=date.value;
    //var reg = /^(?!(0[0-9]{0,}$))[0-9]{1,}[.]{0,}[0-9]{0,}$/;   //>0不包括0的整数正则
    var reg = /^[1-9]\d*$/;
    if (reg.test(num)) {
        $("#totalAmount").val(total);
    }else{
        date.value="";
        layer.msg("请输入数字!", {icon: 0});
    }
}