怎么让div始终居中浏览器可视范围的中间位置
例如我有个div,先让他隐藏起来,然后我在页面中点击超链接,让这个DIV显示出来。现在的问题是,我有个页面很长,当我没有拉动滚动条时,点击某个超链接,让DIV显示并居中好...
例如我有个div,先让他隐藏起来,然后我在页面中点击超链接,让这个DIV显示出来。现在的问题是,我有个页面很长,当我没有拉动滚动条时,点击某个超链接,让DIV显示并居中好办,但是当我拉动滚动条点击下面的超链接时,怎么样让这个DIV仍然出现在屏幕可视范围的中部。
其实我的意思就是无论你的页面有多长,只要你点击了让这个DIV显示的超链接,就始终让这个DIV显示在可视范围的中间位置 展开
其实我的意思就是无论你的页面有多长,只要你点击了让这个DIV显示的超链接,就始终让这个DIV显示在可视范围的中间位置 展开
5个回答
展开全部
代码:
<script type="text/javascript">
var docEle = function()
{
return document.getElementById(arguments[0]) || false;
}
function openNewDiv(_id)
{
var m = "mask";
if (docEle(_id)) document.body.removeChild(docEle(_id));
if (docEle(m)) document.body.removeChild(docEle(m));
//mask遮罩层
var newMask = document.createElement("div");
newMask.id = m;
newMask.style.position = "absolute";
newMask.style.zIndex = "1";
_scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
_scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
newMask.style.width = _scrollWidth + "px";
newMask.style.height = _scrollHeight + "px";
newMask.style.top = "0px";
newMask.style.left = "0px";
newMask.style.background = "#33393C";
newMask.style.filter = "alpha(opacity=40)";
newMask.style.opacity = "0.40";
document.body.appendChild(newMask);
//新弹出层
var newDiv = document.createElement("div");
newDiv.id = _id;
newDiv.style.position = "absolute";
newDiv.style.zIndex = "9999";
newDivWidth = 400;
newDivHeight = 200;
newDiv.style.width = newDivWidth + "px";
newDiv.style.height = newDivHeight + "px";
newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
newDiv.style.background = "#EFEFEF";
newDiv.style.border = "1px solid #860001";
newDiv.style.padding = "5px";
newDiv.innerHTML = " ";
document.body.appendChild(newDiv);
//弹出层滚动居中
function newDivCenter()
{
newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
}
if(document.all)
{
window.attachEvent("onscroll",newDivCenter);
}
else
{
window.addEventListener('scroll',newDivCenter,false);
}
//关闭新图层和mask遮罩层
var newA = document.createElement("div");
newA.innerHTML ="取消";
var newB = document.createElement("TEXTAREA");
newB.setAttribute("cols","40");
newB.setAttribute("rows","10");
newA.onclick = function(){
if(document.all)
{
window.detachEvent("onscroll",newDivCenter);
}
else
{
window.removeEventListener('scroll',newDivCenter,false);
}
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return false;
}
newDiv.appendChild(newB);
newDiv.appendChild(newA);
}
</script>
<body>
<a onclick="openNewDiv('newDiv');return false;" style="cursor:pointer">弹出层</a>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
<script type="text/javascript">
var docEle = function()
{
return document.getElementById(arguments[0]) || false;
}
function openNewDiv(_id)
{
var m = "mask";
if (docEle(_id)) document.body.removeChild(docEle(_id));
if (docEle(m)) document.body.removeChild(docEle(m));
//mask遮罩层
var newMask = document.createElement("div");
newMask.id = m;
newMask.style.position = "absolute";
newMask.style.zIndex = "1";
_scrollWidth = Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
_scrollHeight = Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
newMask.style.width = _scrollWidth + "px";
newMask.style.height = _scrollHeight + "px";
newMask.style.top = "0px";
newMask.style.left = "0px";
newMask.style.background = "#33393C";
newMask.style.filter = "alpha(opacity=40)";
newMask.style.opacity = "0.40";
document.body.appendChild(newMask);
//新弹出层
var newDiv = document.createElement("div");
newDiv.id = _id;
newDiv.style.position = "absolute";
newDiv.style.zIndex = "9999";
newDivWidth = 400;
newDivHeight = 200;
newDiv.style.width = newDivWidth + "px";
newDiv.style.height = newDivHeight + "px";
newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
newDiv.style.background = "#EFEFEF";
newDiv.style.border = "1px solid #860001";
newDiv.style.padding = "5px";
newDiv.innerHTML = " ";
document.body.appendChild(newDiv);
//弹出层滚动居中
function newDivCenter()
{
newDiv.style.top = (document.body.scrollTop + document.body.clientHeight/2 - newDivHeight/2) + "px";
newDiv.style.left = (document.body.scrollLeft + document.body.clientWidth/2 - newDivWidth/2) + "px";
}
if(document.all)
{
window.attachEvent("onscroll",newDivCenter);
}
else
{
window.addEventListener('scroll',newDivCenter,false);
}
//关闭新图层和mask遮罩层
var newA = document.createElement("div");
newA.innerHTML ="取消";
var newB = document.createElement("TEXTAREA");
newB.setAttribute("cols","40");
newB.setAttribute("rows","10");
newA.onclick = function(){
if(document.all)
{
window.detachEvent("onscroll",newDivCenter);
}
else
{
window.removeEventListener('scroll',newDivCenter,false);
}
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return false;
}
newDiv.appendChild(newB);
newDiv.appendChild(newA);
}
</script>
<body>
<a onclick="openNewDiv('newDiv');return false;" style="cursor:pointer">弹出层</a>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
展开全部
有个定位的属性你设置下就可以了,名称是position,有三个属性值fixed,absolute,relative
fixed是浮动,absolute是绝对定位,relative是相对定位.
自己加上这属性再每个值设置过去体会一下就知道了.
fixed是浮动,absolute是绝对定位,relative是相对定位.
自己加上这属性再每个值设置过去体会一下就知道了.
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展开全部
自己体会一下吧。
#mydiv {
background-color: #FFCC66;
border: 1px solid #f00;
text-align: center;
line-height: 40px;
font-size: 12px;
font-weight: bold;
z-index:99;
width: 300px;
height: 120px;
left:50%;/*FF IE7*/
top:50%;/*FF IE7*/
margin-left:-150px!important;/*FF IE7 该值为本身宽的一半 */
margin-top:-60px!important;/*FF IE7 该值为本身高的一半*/
margin-top:0px;
position:fixed!important;/*FF IE7*/
position:absolute;/*IE6*/
_top: expression(eval(document.compatMode &&
document.compatMode=='CSS1Compat') ?
documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2 :/*IE6*/
document.body.scrollTop + (document.body.clientHeight - this.clientHeight)/2);/*IE5 IE5.5*/
}
#mydiv {
background-color: #FFCC66;
border: 1px solid #f00;
text-align: center;
line-height: 40px;
font-size: 12px;
font-weight: bold;
z-index:99;
width: 300px;
height: 120px;
left:50%;/*FF IE7*/
top:50%;/*FF IE7*/
margin-left:-150px!important;/*FF IE7 该值为本身宽的一半 */
margin-top:-60px!important;/*FF IE7 该值为本身高的一半*/
margin-top:0px;
position:fixed!important;/*FF IE7*/
position:absolute;/*IE6*/
_top: expression(eval(document.compatMode &&
document.compatMode=='CSS1Compat') ?
documentElement.scrollTop + (document.documentElement.clientHeight-this.offsetHeight)/2 :/*IE6*/
document.body.scrollTop + (document.body.clientHeight - this.clientHeight)/2);/*IE5 IE5.5*/
}
参考资料: http://hi.baidu.com/liichn/blog/item/bbe93209aa404c206a60fb7b.html
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展开全部
在div外加一个表格,按照表格的形式来实现居中是最好的办法
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代码:
<script
type="text/javascript">
var
docEle
=
function()
{
return
document.getElementById(arguments[0])
||
false;
}
function
openNewDiv(_id)
{
var
m
=
"mask";
if
(docEle(_id))
document.body.removeChild(docEle(_id));
if
(docEle(m))
document.body.removeChild(docEle(m));
//mask遮罩层
var
newMask
=
document.createElement("div");
newMask.id
=
m;
newMask.style.position
=
"absolute";
newMask.style.zIndex
=
"1";
_scrollWidth
=
Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
_scrollHeight
=
Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
newMask.style.width
=
_scrollWidth
+
"px";
newMask.style.height
=
_scrollHeight
+
"px";
newMask.style.top
=
"0px";
newMask.style.left
=
"0px";
newMask.style.background
=
"#33393C";
newMask.style.filter
=
"alpha(opacity=40)";
newMask.style.opacity
=
"0.40";
document.body.appendChild(newMask);
//新弹出层
var
newDiv
=
document.createElement("div");
newDiv.id
=
_id;
newDiv.style.position
=
"absolute";
newDiv.style.zIndex
=
"9999";
newDivWidth
=
400;
newDivHeight
=
200;
newDiv.style.width
=
newDivWidth
+
"px";
newDiv.style.height
=
newDivHeight
+
"px";
newDiv.style.top
=
(document.body.scrollTop
+
document.body.clientHeight/2
-
newDivHeight/2)
+
"px";
newDiv.style.left
=
(document.body.scrollLeft
+
document.body.clientWidth/2
-
newDivWidth/2)
+
"px";
newDiv.style.background
=
"#EFEFEF";
newDiv.style.border
=
"1px
solid
#860001";
newDiv.style.padding
=
"5px";
newDiv.innerHTML
=
"
";
document.body.appendChild(newDiv);
//弹出层滚动居中
function
newDivCenter()
{
newDiv.style.top
=
(document.body.scrollTop
+
document.body.clientHeight/2
-
newDivHeight/2)
+
"px";
newDiv.style.left
=
(document.body.scrollLeft
+
document.body.clientWidth/2
-
newDivWidth/2)
+
"px";
}
if(document.all)
{
window.attachEvent("onscroll",newDivCenter);
}
else
{
window.addEventListener('scroll',newDivCenter,false);
}
//关闭新图层和mask遮罩层
var
newA
=
document.createElement("div");
newA.innerHTML
="取消";
var
newB
=
document.createElement("TEXTAREA");
newB.setAttribute("cols","40");
newB.setAttribute("rows","10");
newA.onclick
=
function(){
if(document.all)
{
window.detachEvent("onscroll",newDivCenter);
}
else
{
window.removeEventListener('scroll',newDivCenter,false);
}
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return
false;
}
newDiv.appendChild(newB);
newDiv.appendChild(newA);
}
</script>
<body>
<a
onclick="openNewDiv('newDiv');return
false;"
style="cursor:pointer">弹出层</a>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
<script
type="text/javascript">
var
docEle
=
function()
{
return
document.getElementById(arguments[0])
||
false;
}
function
openNewDiv(_id)
{
var
m
=
"mask";
if
(docEle(_id))
document.body.removeChild(docEle(_id));
if
(docEle(m))
document.body.removeChild(docEle(m));
//mask遮罩层
var
newMask
=
document.createElement("div");
newMask.id
=
m;
newMask.style.position
=
"absolute";
newMask.style.zIndex
=
"1";
_scrollWidth
=
Math.max(document.body.scrollWidth,document.documentElement.scrollWidth);
_scrollHeight
=
Math.max(document.body.scrollHeight,document.documentElement.scrollHeight);
newMask.style.width
=
_scrollWidth
+
"px";
newMask.style.height
=
_scrollHeight
+
"px";
newMask.style.top
=
"0px";
newMask.style.left
=
"0px";
newMask.style.background
=
"#33393C";
newMask.style.filter
=
"alpha(opacity=40)";
newMask.style.opacity
=
"0.40";
document.body.appendChild(newMask);
//新弹出层
var
newDiv
=
document.createElement("div");
newDiv.id
=
_id;
newDiv.style.position
=
"absolute";
newDiv.style.zIndex
=
"9999";
newDivWidth
=
400;
newDivHeight
=
200;
newDiv.style.width
=
newDivWidth
+
"px";
newDiv.style.height
=
newDivHeight
+
"px";
newDiv.style.top
=
(document.body.scrollTop
+
document.body.clientHeight/2
-
newDivHeight/2)
+
"px";
newDiv.style.left
=
(document.body.scrollLeft
+
document.body.clientWidth/2
-
newDivWidth/2)
+
"px";
newDiv.style.background
=
"#EFEFEF";
newDiv.style.border
=
"1px
solid
#860001";
newDiv.style.padding
=
"5px";
newDiv.innerHTML
=
"
";
document.body.appendChild(newDiv);
//弹出层滚动居中
function
newDivCenter()
{
newDiv.style.top
=
(document.body.scrollTop
+
document.body.clientHeight/2
-
newDivHeight/2)
+
"px";
newDiv.style.left
=
(document.body.scrollLeft
+
document.body.clientWidth/2
-
newDivWidth/2)
+
"px";
}
if(document.all)
{
window.attachEvent("onscroll",newDivCenter);
}
else
{
window.addEventListener('scroll',newDivCenter,false);
}
//关闭新图层和mask遮罩层
var
newA
=
document.createElement("div");
newA.innerHTML
="取消";
var
newB
=
document.createElement("TEXTAREA");
newB.setAttribute("cols","40");
newB.setAttribute("rows","10");
newA.onclick
=
function(){
if(document.all)
{
window.detachEvent("onscroll",newDivCenter);
}
else
{
window.removeEventListener('scroll',newDivCenter,false);
}
document.body.removeChild(docEle(_id));
document.body.removeChild(docEle(m));
return
false;
}
newDiv.appendChild(newB);
newDiv.appendChild(newA);
}
</script>
<body>
<a
onclick="openNewDiv('newDiv');return
false;"
style="cursor:pointer">弹出层</a>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
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