go_visibility = new Array;
function goblink()
{
    if(document.getElementById && document.all)
    	{
    	blink_tab = document.getElementsByTagName('blink');
    	for(a=0;a<blink_tab.length;a++)
    		{
    		if(go_visibility[a] != "visible")
    			go_visibility[a] = "visible";
    		else
    			go_visibility[a] = "hidden";
    		blink_tab[a].style.visibility=go_visibility[a];
    		}
    	}
    setTimeout("goblink()", 500);
}