function opener(addy)
{
	window.open(addy, 'elase',"resizable,width=740,height=320,location=no, scrollbars=yes"); 
}
var dge=document.getElementById;
function cl_expcol(a){
  if(!dge)return;
    document.getElementById(a).style.display = 
      (document.getElementById(a).style.display=='none')?
      'block':'none';
}
function cl_colall(){
	if (!dge) 
		return;
	for (i = 1; document.getElementById('ex' + i); i++) {
		document.getElementById('ex' + i).style.display = 'none';
	}
}