function linkSubmit(categorie) {
var xxwin,wd,hg,breed,hoog;
 breed = 400;
 hoog  = 180;
 if (window.screen) {
  wd=Math.round((window.screen.width-breed)/2);
  hg=Math.round((window.screen.height-hoog)/2);
 } else {
  wd=100;
  hg=100;
 }
 xxwin=window.open("links_submit.php?cat="+categorie,"sbmlnk",'width='+breed+',height='+hoog+',left='+wd+',top='+hg+',dependent=yes,resizable=0,toolbar=0,scrollbars=0');
 if (window.screen) xxwin.focus();
}