function Open_URL() {
  for (var i=0; i< (Open_URL.arguments.length - 1); i+=2) 
    eval(Open_URL.arguments[i]+".location='"+Open_URL.arguments[i+1]+"'");
  document.Return = false;
}

function NewWindow(theURL,winName,x,y,features)
{
  links = (screen.width-x)/2;
  oben  = (screen.height-y)/2; 
  features = features+',height='+y+',width='+x+',top='+oben+',left='+links;
  fenster = window.open(theURL,winName,features);
  fenster.focus();
}