javascript设置div坐标并使其由隐藏变为显示解决方法

javascript设置div坐标并使其由隐藏变为显示
上代码：
<head runat="server">
<title>问题</title>
<style type="text/css">
#div1
{
background: #A2B5CD;
height: 100px;
width: 150px;
}
</style>

<script language="javascript" type="text/javascript">
function ShowDiv() {
var leftdis = document.getElementById("textbox1").offsetLeft;
var topdis = document.getElementById("textbox1").offsetTop;
var _div = document.getElementById("div1");
var setleft = _div.style.left;
var settop = _div.style.top;
setleft = leftdis + "px";
settop = (topdis + 60) + "px";
alert(settop);//测试作用

document.getElementById("div1").style.display = "block";
}
function HiddDiv() {
document.getElementById("div1").style.display= "none";
}

</script>

</head>
<body>
<form id="form1" runat="server">

<asp:TextBox ID="textbox1" runat="server" onfocus="ShowDiv()" onblur="HiddDiv()" />
<div id="div1"style=" display:none ">
ABCDEFG</div>
</form>
</body>
</html>

------解决方案--------------------

HTML code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>问题</title>
    <style type="text/css">
        #div1
        {
            background: #A2B5CD;
            height: 100px;
            width: 150px;
             
        }
    </style>
    <script language="javascript" type="text/javascript">
        function ShowDiv() {
            var leftdis = document.getElementById("textbox1").offsetLeft;
            var topdis = document.getElementById("textbox1").offsetTop;
            var _div = document.getElementById("div1");
            //var setleft = _div.style.marginLeft;
            //var settop = _div.style.marginTop;
                
           // setleft = leftdis + "px";
            //settop = (topdis + 60) + "px";
            //alert(settop); //测试作用
            _div.style.marginTop = (topdis + 60) + "px";
            document.getElementById("div1").style.display = "block";
        }
        function HiddDiv() {
            document.getElementById("div1").style.display = "none";
        }

    </script>
</head>
<body>
    <form id="form1" runat="server">
    <input type='text' id="textbox1"  onfocus="ShowDiv()" onblur="HiddDiv()" style=' position:relative;' />
    <div id="div1" style="display: none">
        ABCDEFG</div>
    </form>
</body>
</html>

javascript设置div坐标并使其由隐藏变为显示解决方法

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