function blink() { 
  if (!document.all) { return; } 
  for (i = 0; i < document.all.length; i++) { 
    obj = document.all(i); 
    if (obj.className == "blink") { 
      if (obj.style.visibility == "visible") { 
        obj.style.visibility = "hidden"; 
      } else { 
        obj.style.visibility = "visible"; 
      } 
    } 
  } 
  setTimeout("blink()", 800); 
}
function showhide(id) {
    if(!document.getElementById) return;
    var style = document.getElementById(id).style;
    if(style.display == "block") style.display = "none";
    else { style.display = "block"; }
}
function left_check(){
 if(left.document.body){
    f=left.document.body.scrollHeight;
    if(f)
    document.getElementById("left_height").height=f+20;
    setTimeout("left_check()",100);
 }else{
    setTimeout("left_check()",100);
 }
}
setTimeout("left_check()",10);
function right_check(){
 if(right.document.body){
    f=right.document.body.scrollHeight;
    if(f)
    document.getElementById("right_height").height=f+20;
    setTimeout("right_check()",100);
 }else{
    setTimeout("right_check()",100);
 }
}
setTimeout("right_check()",10);
function center_check(){
 if(center.document.body){
    f=center.document.body.scrollHeight;
    if(f)
    document.getElementById("center_height").height=f+20;
    setTimeout("center_check()",100);
 }else{
    setTimeout("center_check()",100);
 }
}
setTimeout("center_check()",10);