function	verif_pers(){
var okpers=1;	 
var nbf=0;	 

if ((document.form1.famname.value)==""){
   okpers=0;
	 document.form1.famname.focus(); 
	 alert("Thanks to fill your name");
}
else if ((document.form1.fname.value)==""){
     okpers=0;  
	 document.form1.fname.focus(); 
	 alert("Thanks to fill your first name");
}
else if (document.form1.day.value=="" ||
	document.form1.month.value=="" ||
	document.form1.year.value==""){	 
	okpers=0;  
	document.form1.famname.focus(); 
	alert("Thanks to fill your birth date");
}
else if (document.form1.elements['nat'].options[document.form1.elements['nat'].selectedIndex].value=="" )
{	 okpers=0;
	 document.form1.nat.focus(); 
	 alert("Thanks to fill your nationality");
}
else if (document.form1.elements['rstatus'].options[document.form1.elements['rstatus'].selectedIndex].value=="" )
{	 okpers=0;
	 document.form1.rstatus.focus(); 
	 alert("Thanks to fill your research status");
}
else if (document.form1.elements['field1'].options[document.form1.elements['field1'].selectedIndex].value=="" )
{	 okpers=0;
	 document.form1.elements['field1'].focus(); 
	 alert("Thanks to fill your scientific fields ");

}
else if ((document.form1.mail.value)=="")
{	 okpers=0;
	 document.form1.mail.focus(); 
	 alert("Thanks to fill your mail");
	 
}
else if ((document.form1.lstatus.value)==""){ 
     okpers=0;   
     document.form1.lstatus.focus(); 
     alert("Thanks to fill your institution type");
}
else if ((document.form1.town.value)=="")
{	 okpers=0;
         document.form1.town.focus(); 
	 alert("Thanks to fill your town");
}
else if ((document.form1.country.value)=="")
{	 okpers=0;
	 document.form1.country.focus(); 
	 alert("Thanks to fill your country");
}
else if ((document.form1.dept.value)=="")
{	 okpers=0;
	 document.form1.dept.focus(); 
	 alert("Thanks to fill your department");
}
else if ((document.form1.position.value)=="")
{	 okpers=0;
	 document.form1.position.focus(); 
	 alert("Thanks to fill your postion");
}
else if ((document.form1.expertise.value)=="")
{	 okpers=0;
	 document.form1.expertise.focus(); 
	 alert("Thanks to fill your background");
}
       return okpers;
}

function getOb() {
  var ob;

  if(document.layers) {
    alert('document.layer ok');
    if(getOb.arguments.length>1){
      alert('lenght>1');
      var stob="document.layers['"+getOb.arguments[0]+"']"
	for(i=1;i<getOb.arguments.length;i++) { 
	  alert('getOb.arguments'+i+';');
	  stob+=".document.layers['"+getOb.arguments[i]+"']" 
	}
      ob=eval(stob);
    }
    else ob=document.layers[getOb.arguments[0]];
  }
  else { ob=getOb.arguments[getOb.arguments.length-1]; 
  }
  return (document.layers)?ob:(document.all)?eval('document.all.'+ob):(document.getElementById)?eval('document.getElementById("'+ob+'")'):null;
}
function getObst(ob) { return (document.layers)?ob:ob.style }
function show(ob) { getObst(ob).visibility = (document.layers)?"show":"visible" }
function hide(ob) { getObst(ob).visibility = (document.layers)?"hide":"hidden" }

function clp(ob,htm,lgd,htp,lgg) {
  
  if(document.layers){
    alert('document.layers ok');
    ob.clip.top=htm;
    ob.clip.right=lgd;
    ob.clip.bottom=htp;
    ob.clip.left=lgg;
  }
  else{ 
    getObst(ob).clip = eval("'rect("+htm+"px, "+lgd+"px, "+htp+"px, "+lgg+"px)'");
  }
}
function eny(ob,px){
  if(document.all) getObst(ob).pixelTop=px
  else getObst(ob).top=px
}

function scrllY() { return (document.all)?document.body.scrollTop:window.pageYOffset }

function scroller() { eny(getOb("arrondi"),scrllY()) }

function initscrll() {
  if(document.all) window.onscroll=scroller
  else if(document.getElementById) getObst(getOb('arrondi')).position='fixed'
  else setInterval('scroller()',15)
}

function showHide(id, tt){
  //alert("id="+id);
  for (var i=0; i<tt; i++){
    if(i==id){
      //alert("id="+id);
      if(ns4){
	document.layers[i].display="block";
      }
      else if(ie4){
	document.all[i].style.display="block";
      }
      else if(ie5 || ns6){
	document.getElementById(i).style.display="block";
      }
    }
    else {
      if(ns4){
	document.layers[i].display="none";
      }
      else if(ie4){
	document.all[i].style.display="none";
      }
      else if(ie5 || ns6){
	document.getElementById(i).style.display="none";
      }
    }
  }
}