var flag=false;
function DrawImage2(ImgD){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= 351/420){
if(image.width>351){ 
ImgD.width=351;
ImgD.height=(image.height*351)/image.width;
}else{
ImgD.width=image.width; 
ImgD.height=image.height;
}
}
else{
if(image.height>420){ 
ImgD.height=420;
ImgD.width=(image.width*420)/image.height; 
}else{
ImgD.width=image.width; 
ImgD.height=image.height;
}
}
}
}