function popup(txt,hoogte,breedte)
{
window.open(txt, 'txt', 'toolbar=no, location=no, resizable=yes, left=40, top=100, width='+breedte+', height='+hoogte+', scrollbars=yes')
}

function verander_opener(url)
{
	opener.location.href = url;
	window.close();
}

function toonverberg(item){
	item = new getObj(item)
	if(item.style.display == 'block'){
		item.style.display = 'none'
    } else {
		item.style.display = 'block'
	}
}

function getObj(name)
{
  if (document.getElementById)
  {
  	this.obj = document.getElementById(name);
	this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
	this.obj = document.all[name];
	this.style = document.all[name].style;
  }
  else if (document.layers)
  {
   	this.obj = document.layers[name];
   	this.style = document.layers[name];
  }
}