function openup(url,name) {
   helper = 		   window.open(url,name,'width=300,height=500,resizable=0,scrollbars=0,toolbar=0,status=1,marginwidth=0,marginheight=0')
   }

function cover(url,name) {
   helper = 		   window.open(url,name,'width=500,height=500,resizable=0,scrollbars=0,toolbar=0,status=1,marginwidth=0,marginheight=0')
   }


function toggledisplay (id){
  if (document.getElementById) {
    var mydiv = document.getElementById(id);
    mydiv.style.display = (mydiv.style.display=='block'?'none':'block');
  }
}



var out="";
var limg="";


function off() {
  if (out=="") { return; }
  if (document.images) {
    document.images[limg].src=out;
    out="";
  }
}

function on(img,o1,o2) {
  if (document.images) {
  if (out != "") { off(); }
    document.images[img].src=o1;
    out=o2;
    limg=img;
  }
}