http://zzdsw.com/images/Html.js

1function DrawImage(MyPic,W,H){
2  var flag=false;
3  var image=new Image();
4  image.src=MyPic.src;
5  if(image.width>0 && image.height>0){
6    flag=true;
7    if(image.width/image.height>= W/H){
8      if(image.width>W){
9        MyPic.width=W;
10        MyPic.height=(image.height*W)/image.width;
11      }
12	  else{
13        MyPic.width=image.width;
14        MyPic.height=image.height;
15      }
16    }
17    else{
18      if(image.height>H){
19        MyPic.height=H;
20        MyPic.width=(image.width*H)/image.height;
21      }
22	  else{
23        MyPic.width=image.width;
24        MyPic.height=image.height;
25      }
26    }
27  }
28}