//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 secBoard(n)
  {
    //for(i=0;i<secTable.cells.length;i++)
      //secTable.cells[i].className="sec1";
    //secTable.cells[n].className="sec2";
    for(i=0;i<mainTable.tBodies.length;i++)
      mainTable.tBodies[i].style.display="none";
    mainTable.tBodies[n].style.display="block";
  }
function kk(sf){
var sf;
window.open ('open.aspx?bookid='+sf, 'newwindow', 'height=400, width=500, toolbar=no, menubar=no, scrollbars=yes, resizable=no,location=no, status=no'); 
}
function pl(sf){
var sf;
window.open ('bookpinglun.aspx?bookid='+sf, 'newwindow', 'height=300, width=450, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no'); 
}
function tuijian(sf){
var sf;
window.open ('friend.aspx?bookid='+sf, 'newwindow', 'height=300, width=375, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no'); 
}
function xx(){
window.event.srcElement.style.cursor="hand";
}