/**
图片宽度高度缩小函数
author：jingking
ImgD：要传送的图片参数
width：定义允许图片宽度 
height：定义允许图片高度
**/
var flag=false; 
function DrawImage(ImgD,width,height){ 
 var image=new Image(); 
 var iwidth = width; 
 var iheight = height; 
 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 addfavor(url,title) {
    if(confirm("网站名称："+title+"\n网址："+url+"\n确定添加收藏?")){
        var ua = navigator.userAgent.toLowerCase();
        if(ua.indexOf("msie 8")>-1){
            external.AddToFavoritesBar(url,title,'');//IE8
        }else{
            try {
                window.external.addFavorite(url, title);
            } catch(e) {
                try {
                    window.sidebar.addPanel(title, url, "");//firefox
                } catch(e) {
                    alert("加入收藏失败，请使用Ctrl+D进行添加");
                }
            }
        }
    }
    return false;
}