function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//选项卡
function setTab(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con=document.getElementById(name+i+"c");
  menu.className=i==cursel?("hover"):"";
  con.style.display=i==cursel?"block":"none";
 }
}

window.onload=function(){
	MM_preloadImages('images/dh_1.jpg','images/dh_2.jpg','images/dh4_2.jpg','images/dh4_1.jpg','images/dh_3.jpg','images/dh_4.jpg','images/dh_5.jpg','images/dh_6.jpg')
}


function UrlSearch() 
{
   var name,value; 
   var str=location.href; //取得整个地址栏
   var num=str.indexOf("?") 
   if(num>0){
	   str=str.substr(num+1); //取得所有参数
	   var arr=str.split("&"); //各个参数放到数组里
	   for(var i=0;i < arr.length;i++){ 
		num=arr[i].indexOf("="); 
		if(num>0){ 
		 name=arr[i].substring(0,num);
		 value=arr[i].substr(num+1);
		 this[name]=value;
		 } 
		} 
   }
} 


function gBS(){//获取窗口文本大小
			BSW=document.documentElement.clientWidth;//如果body样式没有设margin=0，则为：BSW=document.documentElement.clientWidth
			BSH=document.documentElement.clientHeight;
			BSHs=document.documentElement.scrollHeight;
			BSHt=document.documentElement.scrollTop;
			if (BSHs<BSH){BSHs = BSH;}
		}
function showTips(obj,Winw,Winh){
			gBS();
			var doc=document;
			var docB=doc.body;
			var tips = doc.getElementById(obj);
			var bg=doc.getElementById("bgDiv");
			var relTop=(BSH - Winh)/2 > 0 ? (BSH - Winh)/2:0;
			var objTop = parseInt(BSHt+relTop)+"px";
			var objLeft = parseInt(document.body.scrollLeft+(BSW - Winw)/2)+"px";
				if (tips.style.display == "none"){
					tips.style.display = "";
					bg.style.display = "";
					
					tips.style.top = objTop;
					tips.style.left = objLeft;	
					tips.style.zIndex = "99";	
					bg.style.zIndex = "98";
					bg.style.top = "0";
					bg.style.left = "0";
					bg.style.width = BSW+"px";
					bg.style.height = BSHs+"px";
					bg.style.position = "absolute";
					bg.style.display = "block";
					bg.style.background = "#000";
					bg.style.filter="alpha(opacity=50)";
					bg.style.opacity="0.5";
				} else {
					tips.style.display = "none";
					bg.style.display = "none";
				}	
				
			return false;
}