JavaScript通过id获取不到元素是什么原因阿？

2024-08-27 23:21:05 219人阅读

s代码

JavaScript code

function show_more_mess()

{

$("#background_div").css("width","100%");//获取这个div的时候是没有问题的

$("#background_div").css("height","100%");

$("#background_div").css("position","absolute");

$("#background_div").css("left","0");

$("#background_div").css("top","0");

$("#background_div").css("display","block");

alert(document.getElementById("more_mess").innerHTML);//这边是作测试用的，报错显示获取不到这个元素

}

function show_div()

{

$("#more_mess").css("display","block");//这边没有象没有执行一样

}

asp.net前台代码

C# code

<div id="background_div" runat="server" style="position:absolute; display:none; background:#999999; filter:Alpha(opacity=50)">

</div>

<div id="more_mess" runat="server" style="position:absolute;width:100px; height:100px; background:red; display:none; z-index:10">

<div>账户:<asp:TextBox ID="TextBox_show_username" runat="server"></asp:TextBox></div>

<div>密码:<asp:TextBox ID="TextBox_show_pwd" runat="server"></asp:TextBox></div>

</div>

asp.net后台代码

C# code

background_div.InnerHtml = "<script>show_more_mess();";

try

{

TextBox_show_pwd.Text = "a";

TextBox_show_username.Text = "b";

background_div.InnerHtml = "<script>show_div();</script>";

//后台是可以获取到more_mess这个div的

}