文本框仅允许输入大于0的正整数

系统有个栏位，作为参数设置，限制用户只能输入大于0的正整数：

 

<input type="text" name="non" ng-model="non" 
                    onpaste="return false;"
                    onkeyup="if (
                                    this.value.length == 1
                                ) {
                                    this.value = this.value.replace(/[^1-9]/g, '')
                                }
                                else {
                                    this.value = this.value.replace(/\D/g, '')
                                }"
                    onafterpaste="if (
                                    this.value.length == 1) {
                                    this.value = this.value.replace(/[^1-9]/g, '0')
                                }
                                else {
                                    this.value = this.value.replace(/\D/g, '')
                                }" />

Source Code