html表单验证
表单验证时，出现错误，显示错误框（不用alert）
李昱萱浏览 1663回答 1
1回答
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慕瓜9220888
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HalfAnHour
贤心的layer，或者老外的sweetalert（兼容性不好，低版本ie不支持，但是效果好看）
随时随地看视频慕课网APP
Html/CSS