<html>
<head>
<title>响应鼠标自动选中文本框内容</title>
</head>
<body>
<input id="a" type="text" value="请输入搜索词" onmouseover="selectInputContent(this.id)"/>
<script type="text/javascript">
function selectInputContent(n){
obj =document.getElementById(n);
obj.focus();
obj.select();
}
</script>
</body>
</html>