<form><input type="text"name="content_yp"onfocus="if(this.value=='请输入关键字') {this.value='';}this.style.color='#000';" onblur="if(this.value=='') {this.value='请输入关键字';this.style.color='#999';}" value="请输入关键字"style="width:45%;"/><select id="select_yp"style="border:1px solid grey;margin:1px;padding:2px 3px;"><option value="http://m.baidu.com/s?from=2001a&bd_page_type=1&word=site:pan.baidu.com+">百度云盘</option><option value="http://www.google.com.hk/search?hl=zh-CN&newwindow=1&safe=strict&q=site:pan.baidu.com+">谷歌度盘</option></select><input type="button"value=" 搜 索"onclick="location.href=document.getElementById('select_yp').value+document.getElementsByName('content_yp')[0].value;"/></form>