var pic=Array()
pic[1]=new Image(); pic[1].src="card7.gif"
pic[2]=new Image(); pic[2].src="cardd.gif"
var count=0
var first=0
function click(n)

{
count++

  if (count==1)
  {

    document.images["i"+n].src=pic[2].src

    first=n

  }

  if (count>1)
  {

    if (n!=first)
    {

      document.images["i"+n].src=pic[1].src

    }

  }

}