//图片按比例缩放
var flag=false;
function DrawImage(ImgD,iwidth,iheight){
    //参数(图片,允许的宽度,允许的高度)
    var image=new Image();
    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;
        }
        ImgD.alt=image.width+"×"+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;
        }
        ImgD.alt=image.width+"×"+image.height;
        }
    }
} 




function aa(Dir)
{tt.doScroll(Dir);Timer=setTimeout('aa("'+Dir+'")',10)}//这里100为滚动速度
function StopScroll(){if(Timer!=null)clearTimeout(Timer)}



function initIt(){
divColl=document.all.tags("DIV");
for(i=0; i<divColl.length; i++) {
whichEl=divColl(i);
if(whichEl.className=="child")whichEl.style.display="none";}
}
function expands(el) {
whichEl1=eval(el+"Child");
if (whichEl1.style.display=="none"){
initIt();
whichEl1.style.display="block";
}else{whichEl1.style.display="none";}
}
var tree= 0;
function loadThreadFollow(){
if (tree==0){
document.frames["hiddenframe"].location.replace("LeftTree.asp");
tree=1
}
}
function showsubmenu(sid)
{
whichEl = eval("submenu" + sid);
//imgmenu = eval("imgmenu" + sid);
if (whichEl.style.display == "none")
{
eval("submenu" + sid + ".style.display=\"\";");
//imgmenu.background="images/menuup.gif";
}
else
{
eval("submenu" + sid + ".style.display=\"none\";");
//imgmenu.background="images/menudown.gif";
}
}
function loadingmenu(id){
var loadmenu =eval("menu" + id);
if (loadmenu.innerText=="Loading..."){
document.frames["hiddenframe"].location.replace("LeftTree.asp?menu=menu&id="+id+"");
}
}