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<head><meta charset="utf-8"><title>选择搜索引擎进行搜索</title><script>function searchSelectedEngine() {var keyword = document.getElementById('keyword').value;var engine = document.getElementById('engine').value;var encodedKeyword = encodeURIComponent(keyword);var searchUrl;switch (engine) {case 'bing':searchUrl = "https://www.bing.com/search?q=" + encodedKeyword;break;case 'baidu':searchUrl = "https://www.baidu.com/s?wd=" + encodedKeyword;break;case 'sogou':searchUrl = "https://www.sogou.com/web?query=" + encodedKeyword;break;case 'so':searchUrl = "https://www.so.com/s?q=" + encodedKeyword;break;default:alert("请选择一个搜索引擎。");return;}window.open(searchUrl, "_blank");}</script>
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<body><h1>选择搜索引擎进行搜索</h1><label for="keyword">输入关键词：</label><input type="text" id="keyword" required><label for="engine">选择搜索引擎：</label><select id="engine"><option value="bing">Bing</option><option value="baidu">Baidu</option><option value="sogou">Sogou</option><option value="so">So.com</option></select><button onclick="searchSelectedEngine()">搜索</button>
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