// 首页切换显示论坛和栏目中的类别
function secBoard0(n)
  {
  try
  {
  for(i=0;i<4;i++)  
     document.getElementById("cate"+i).className="ygRB6";
     document.getElementById("cate"+n).className="ygRB2";
  
  for(i=0;i<4;i++)   
     document.getElementById("catenews"+i).style.display="none";
     document.getElementById("catenews"+n).style.display="";
   }
   catch(e){}
  }  
function secBoard1(n)
  {
  try
  {
  for(i=0;i<10;i++)   
  {
     document.getElementById("catesixnews"+i).style.display="none";
     document.getElementById("cn"+i).className="cn_T_O";
  }
  
     document.getElementById("cn"+n).className="cn_T_white";
     document.getElementById("catesixnews"+n).style.display="";
  }
  catch(e){}
  }  
  function secBoard(n)
  {
  try
  {
  for(i=0;i<7;i++)  
     document.getElementById("bbscate"+i).className="disc_T_O";
     document.getElementById("bbscate"+n).className="disc_T_white";
  
  for(i=0;i<7;i++)   
     document.getElementById("bbs"+i).style.display="none";
     document.getElementById("bbs"+n).style.display="";
  }
  catch(e){}
  }
  function secBoardtoppic(n)
  {
  try
  {
  for(i=0;i<4;i++)  
     document.getElementById("top"+i).className="tag_label";
     document.getElementById("top"+n).className="tag_label  tag_current";
  
  for(i=0;i<4;i++)   
     document.getElementById("toppic"+i).style.display="none";
     document.getElementById("toppic"+n).style.display="";
  }
  catch(e){}
  }
  
function AutoHeight(ObjA,ObjB){ 
try
{
var maxHth; 
var H1=document.getElementById(ObjA).scrollHeight; 
var H2=document.getElementById(ObjB).scrollHeight; 
maxHth=Math.max(H1,H2); 
document.getElementById(ObjA).style.height=maxHth+"px"; 
document.getElementById(ObjB).style.height=maxHth+"px"; 
}
catch(e){}
}
//end

//图片按比例缩放
var flag=false;
function DrawImage(ImgD,wi,hi){
var image=new Image();
var iwidth = wi; 
var iheight = hi;
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= iwidth/iheight){
if(image.width>iwidth){ 
ImgD.width=iwidth;
ImgD.height=(image.height*iwidth)/image.width;
}else{
ImgD.width=image.width; 
ImgD.height=image.height;
}
}
else{
if(image.height>iheight){ 
ImgD.height=iheight;
ImgD.width=(image.width*iheight)/image.height; 
}else{
ImgD.width=image.width; 
ImgD.height=image.height;
}
}
}
} 


function AddFavorite(sURL, sTitle)
{
    try
    {
         window.external.addFavorite(sURL, sTitle);
     }
    catch (e)
    {
        try
        {
             window.sidebar.addPanel(sTitle, sURL, "");
         }
        catch (e)
        {
             alert("加入收藏失败，请使用Ctrl+D进行添加");
         }
     }
}

function SetHome(obj,vrl){
        try{
                 obj.style.behavior='url(#default#homepage)';obj.setHomePage(vrl);
         }
        catch(e){
                if(window.netscape) {
                        try {
                                 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); 
                         } 
                        catch (e) {
                                 alert("此操作被浏览器拒绝！请在浏览器地址栏输入“about:config”并回车然后将[signed.applets.codebase_principal_support]设置为'true'"); 
                         }
                        var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService

(Components.interfaces.nsIPrefBranch);
                         prefs.setCharPref('browser.startup.homepage',vrl);
                  }
         }
}