图片压缩
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<style> p{ width: 100px; height: 100px; display: none; background: red; } </style> <body> <input type="button" value="提交" id="tj"> <p id="p"></p> </body> <script> var btn = document.getElementById("tj"); var t = true; btn.onclick = function dian() { var p = document.getElementById("p"); if (t) { p.style.display = "block"; } else { p.style.display = "none"; } t = !t; } </script>
