if (document.all) {
       docObj="document.all."
       styleObj=".style"
       }
  else {
       docObj="document."
       styleObj=""
       }

  bcols = new Array("","blue","red")

  function bcol(i,swidth,sheight) {
  if (document.all) {
     block1 = eval(docObj + "bottom"+i + styleObj)
     block1.backgroundColor=bcols[i]
     block1.left=0
     block1.width=swidth
     block1.top=sheight
     block1.height=3
     block1.visibility = "visible"

     block2 = eval(docObj + "right"+i + styleObj)
     block2.backgroundColor=bcols[i]
     block2.left=swidth
     block2.width=3
     block2.top=0
     block2.height=sheight
     block2.visibility = "visible"
     }
    }