Each of the input elements has a validity property.
每个输入元素拥有一个validity属性。
DOM support for validity, with a validity attribute for form elements, and a new invalid event.
验证的DOM支持，为表单元素增加了validity属性和新的invalid事件。
The dynamic equation of elastic linkage with compliance elements is derived for the first time and the validity of new balancing method is discussed.
首次推导出具有弹性元件的弹性连杆机构动力学方程，从理论上阐述了此平衡方法的有效性。
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