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>
<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>
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);//测试作用你这里能输出正确结果?
document.getElementById("div1").style.display = "block";
}
<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>
var setleft = _div.style.marginLeft;
setleft = leftdis + "px";
你这样只是把变量的值改变了。。本质功能并没有实现。。