// JavaScript Document
/*change main image*/
function changeImage(ImgD,width_s,height_s) {
 var mainImg = document.getElementById("mainImg");
 //alert(mainImg.name);
 //alert("run!!");
 var image=new Image();
 image.src=ImgD.src;
 if(image.width>0 && image.height>0){
  flag=true;
  mainImg.src = ImgD.src;
  if(image.width/image.height>=width_s/height_s){
   if(image.width>width_s){
    mainImg.width=width_s;
    mainImg.height=(image.height*width_s)/image.width;
   }else{
    mainImg.width=image.width;
    mainImg.height=image.height;
   }
  }else{
   if(image.height>height_s){
    mainImg.height=height_s;
    mainImg.width=(image.width*height_s)/image.height;
   }else{
    mainImg.width=image.width;
    mainImg.height=image.height;
   }
  }
 }

}


/*change image size*/
function DrawImage(ImgD,width_s,height_s){

var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>=width_s/height_s){
if(image.width>width_s){
ImgD.width=width_s;
ImgD.height=(image.height*width_s)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
else{
if(image.height>height_s){
ImgD.height=height_s;
ImgD.width=(image.width*height_s)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
}
/*else{
ImgD.src="";
ImgD.alt=""
}*/
ImgD.style.display="";
}