var r2c2Image = new Image;
r2c2Image.src = "insides/r2c2.jpg";
var r2c4Image = new Image;
r2c4Image.src = "insides/r2c4.jpg";
var r4c2Image = new Image;
r4c2Image.src = "insides/r4c2.jpg";
var r4c4Image = new Image;
r4c4Image.src = "insides/r4c4.jpg";
var r4c6Image = new Image;
r4c6Image.src = "insides/r4c6.jpg";
var r4c8Image = new Image;
r4c8Image.src = "insides/r4c8.jpg";
var r4c10Image = new Image;
r4c10Image.src = "insides/r4c10.jpg";
var r6c2Image = new Image;
r6c2Image.src = "insides/r6c2.jpg";
var r6c4Image = new Image;
r6c4Image.src = "insides/r6c4.jpg";
var r6c6Image = new Image;
r6c6Image.src = "insides/r6c6.jpg";
var r6c8Image = new Image;
r6c8Image.src = "insides/r6c8.jpg";

function showInside(row,col)
{
  var imgName = "r" + row + "c" + col;
  var doc = "document." + imgName + ".src";
  var docname = eval(doc);
  var pos;
  pos = docname.indexOf("outsides/");
  
  if(pos!=-1)
  {
    eval(doc + " = 'insides/" + imgName + ".jpg'");
  }
  else
  {
    eval(doc + " = 'outsides/" + imgName + ".jpg'");
  }
}