My OpenLayers Map


#map {
clear: both;
position: relative;
width: 1000px;
height: 600px;
border: 1px solid black;
}

#operator {
position: absolute;
top:10px;
left:40px;
z-index: 3000;
}

#popDiv {
position: absolute;
visibility: hidden;
overflow: hidden;
border: 2px solid #AEBBCA;
background-color: #EEF1F8;
cursor: move;
padding: 1px;
z-index:4000;
}

#popTitle {
background: #9DACBF;
height: 20px;
line-height: 20px;
padding: 1px;
}

#popForm {
padding: 2px;
padding-left: 15px;
}

.title_left {
font-weight: bold;
padding-left: 5px;
float: left;
}

.title_right {
float: right;
}

#popTitle .title_right a {
color: #000;
text-decoration: none;
}

#popTitle .title_right a:hover {
text-decoration: underline;
color: #FF0000;
}




function init() {
format = 'image/png';
var bounds = new OpenLayers.Bounds(
121.120606, 28.169589,
121.871688, 28.525587
);
var options = {
controls: [],
maxExtent: bounds,
maxResolution: 0.0013726171875,
projection: "EPSG:4326",
units: 'degrees'
};
map = new OpenLayers.Map('map', options);
//基础图层，可以用一个图层组做基础图层
var baselayer = new OpenLayers.Layer.WMS(
"底图",
"http://localhost:8080/geoserver/WenLing/wms",
{
layers:'WenLing:xianjie_region',
format:format,
},
{
isBaseLayer:true,//设置本层为基底图层
yx : {'EPSG:4326' : true}
}
);

//县界
var xianjie = new OpenLayers.Layer.WMS(
"县界",
"http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:xianjie_region',
transparent:true, //设置从服务器返回的地图图像是透明的
format: format
},
{
displayInLayerSwitcher:false, //使该图层不显示在switcher中
//minScale:xxx , //只有达到一定缩放比例该图层时才显示
opacity:0.5 //设置客户端图层半透明
}
);

//水系
var waters = new OpenLayers.Layer.WMS(
"水系", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:shuixi_region',
transparent:true,
format: format
},
{
opacity:1 //设置客户端图层不透明
}
);

//岛屿
var islands = new OpenLayers.Layer.WMS(
"岛", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:dao_region',
transparent:true,
format: format
},
{
opacity:0.5
}
);

//铁路
var tielu = new OpenLayers.Layer.WMS(
"铁路", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:tielu_polyline',
transparent:true,
format: format
},
{
transitionEffect:"resize", //使该图层放大或缩小时产生调整大小的动画
opacity:0.5
}
);

//县
var xian = new OpenLayers.Layer.WMS(
"县", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:xian_point',
transparent:true,
format: format
},
{
//minScale:xxx , //只有达到一定缩放比例该图层时才显示
opacity:0.5
}
);

//变电站
biandianzhan = new OpenLayers.Layer.WMS(
"变电站", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:biandianzhan_point',
transparent:true,
format: format
},
{
opacity:0.5
}
);

guangxianwang = new OpenLayers.Layer.WMS(
"光纤网", "http://localhost:8080/geoserver/WenLing/wms",
{
layers: 'WenLing:guangxianwang_polyline',
transparent:true,
format: format
},
{
transitionEffect:"resize", //使该图层放大或缩小时产生调整大小的动画
opacity:0.5
}
);

map.addLayers([baselayer, xianjie, waters, islands, tielu, xian, biandianzhan, guangxianwang]);

map.setCenter(map.getCenter());//设置地图中心点
map.addControl(new OpenLayers.Control.PanZoomBar({
position: new OpenLayers.Pixel(2, 15)
}));
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.addControl(new OpenLayers.Control.Scale($('scale')));
map.addControl(new OpenLayers.Control.MousePosition());
map.zoomToExtent(bounds);

if (!map.getCenter()) {
map.zoomToMaxExtent();
}

}

function showPopup() {//弹出层
var objDiv = document.getElementById("popDiv");
objDiv.style.top = "50px";//设置弹出层距离上边界的距离
objDiv.style.left = "200px";//设置弹出层距离左边界的距离
objDiv.style.width = "300px";//设置弹出层的宽度
objDiv.style.height = "220px";//设置弹出层的高度
//objDiv.style.display = "block";
objDiv.style.visibility = "visible";
}
function hidePopup() {//关闭层
var objDiv = document.getElementById("popDiv");
objDiv.style.visibility = "hidden";
}







/*-------------------------鼠标左键拖动---------------------*/
/*--------当不需要实现此功能时，可以将这一部分代码删除------------*/
var objDiv = document.getElementById("popDiv");
var isIE = document.all ? true : false;//判断浏览器类型
document.onmousedown = function(evnt) {//当鼠标左键按下后执行此函数
var evnt = evnt ? evnt : event;
if (evnt.button == (document.all ? 1 : 0)) {
mouseD = true;//mouseD为鼠标左键状态标志，为true时表示左键被按下
}
}

objDiv.onmousedown = function(evnt) {
objDrag = this;//objDrag为拖动的对象
var evnt = evnt ? evnt : event;
if (evnt.button == (document.all ? 1 : 0)) {
mx = evnt.clientX;
my = evnt.clientY;
objDiv.style.left = objDiv.offsetLeft + "px";
objDiv.style.top = objDiv.offsetTop + "px";
if (isIE) {
objDiv.setCapture();
//objDiv.filters.alpha.opacity = 50;//当鼠标按下后透明度改变
} else {
window.captureEvents(Event.MOUSEMOVE);//捕获鼠标拖动事件
//objDiv.style.opacity = 0.5;//当鼠标按下后透明度改变
}
}
}
document.onmouseup = function() {
mouseD = false;//左键松开
objDrag = "";
if (isIE) {
objDiv.releaseCapture();
//objDiv.filters.alpha.opacity = 100;//当鼠标左键松开后透明度改变
} else {
window.releaseEvents(objDiv.MOUSEMOVE);//释放鼠标拖动事件
//objDiv.style.opacity = 1;//当鼠标左键松开后透明度改变
}
}

document.onmousemove = function(evnt) {
var evnt = evnt ? evnt : event;
if (mouseD == true && objDrag) {
var mrx = evnt.clientX - mx;
var mry = evnt.clientY - my;
objDiv.style.left = parseInt(objDiv.style.left) + mrx + "px";
objDiv.style.top = parseInt(objDiv.style.top) + mry + "px";
mx = evnt.clientX;
my = evnt.clientY;
}
}