纯JS实现省市县三级下拉联动,供大家参考,具体内容如下 代码如下: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>省市县三级下拉联动-李康</title> <style> fieldset{ width: 25%; border: 1px dashed black; } legend{ margin-left: 135px; } </style> </head> <bod