function change_page(urlpage1,urlpage2) { 
top.frametop.location=urlpage1; 
top.framebottom.location=urlpage2; 
} 


<!--
function ChangeStatut(katalog) {
if(katalog.regagree.checked == true) {katalog.validation.disabled = false }
if(katalog.regagree.checked == false) {katalog.validation.disabled = true }
}
function ChangeStatut2(katalog) {
if(katalog.regagree2.checked == true) {katalog.validation2.disabled = false }
if(katalog.regagree2.checked == false) {katalog.validation2.disabled = true }
}
//-->
<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->