function append(el,id){el.href+='#'+id;}

function doBlink()
{
var blink = document.getElementsByTagName('BLINK');
for (var i=0; i < blink.length; i++)
  blink[i].style.visibility = blink[i].style.visibility == '' ? 'hidden' : '' 
}
setInterval('doBlink()',1000);