jsp html 实现隐藏输入框，点击可以取消隐藏&&弹出输入框

jsp代码：

<script language="javascript" type="text/javascript">

function chg (){

if(document.getElementById('mydiv').style.display=="none"){

document.getElementById('mydiv').style.display="";

}

}

</script>

html代码：

echo "<input type='button' value='评论' onclick='chg()'>

<div id='mydiv' style='display:none;'>

<form id='myform' >

<input type='textbox' id='pinlun' >

<input type='submit' id='sbmt'  value='提交' >

</form>

</div>";

、、、、、、、、、、、、、、

<script language="javascript" type="text/javascript">

function review(){

var ret = prompt("请输入评论内容！","");

if (ret == null){

return false;

}else if (ret.replace(/^\s+|\s+$/g,"") == ""){

alert("输入内容为空！");

return false;

}

document.getElementById("TextBox1").value=ret;

}

function transmit(){

var ret = prompt("请输入转发感慨！","");

if (ret == null){

return false;

}else if (ret.replace(/^\s+|\s+$/g,"") == ""){

alert("输入内容为空！");

return false;

}

document.getElementById("TextBox1").value=ret;

}

</script>

$review_button_name='review'.$user_id."_".$row['user_id'];

$transmit_button_name='transmit'.$user_id."_".$row['user_id'];

echo "<a href='blogProcess.php' onclick='return review()' class='href_style'>评论</a>

<a href='blogProcess.php' onclick='return transmit()' class='href_style'>转发</a>";