javascr ipt IP输入框 , 输入限制，只能输入数字兼容ie和W3C标准浏览器,javascr ipt IP input box, type constraints, ie can only enter numbers and W3C standards-compliant browser

实现了一个js的在线小测试，有时间限制，超时可超新测试一次。测试结束有分数及详细报告。-Js to achieve a small test online, there are time constraints, overtime can be a super-new test. The end of the test scores and a detailed report there.

这个实例还不是很完善，因为时间、条件和个人能力的限制，系统还存在不完善的地方，希望能在今后的不断学习与应用中把它扩充得更加丰富-This example is not perfect, because of the time, conditions and individual capacity constraints, there are imperfections in the system, hoping in the future application of continuous le