var clickedname = "";

function move_in(img_name,img_src) {
   document[img_name].src=img_src;
}

function move_out(img_name,img_src) {
   if (img_name != clickedname) {
      document[img_name].src=img_src;
   }
}

function move_less(img_name,img_src1,img_src2) {
   if (clickedname != "") {
      document[clickedname].src=clickedsrc; }
   document[img_name].src=img_src1;
   clickedname = img_name; clickedsrc = img_src2;
}

function move_lose() {
   clickedname = "";
}