// JavaScript Document
<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function CheckFields(numfields, step){
	var nf = numfields;
	var st=step;
	var ok=1;
	
	for(i=1; i<=nf; i++){
		if(document.getElementById("id"+i).value==""){
			var fval = document.getElementById("id"+i).name;
		    alert("Please fill in " + fval + " field. Thank you.");
	
			if(i==1 & st == 3){
				alert("Please fill in first author's name field. Thank you.");
			}
			if(i==2 & st == 3){
				alert("Please fill in first author's surname field. Thank you.");
			}
			ok=0;
		}
	}
	
	if(st==3){
			var or=document.getElementById("oral");
			var ps=document.getElementById("poster");
			if(or.checked==false & ps.checked==false){
				alert("Please choose type of your contribution (oral/poster).");
				ok=0;
			}
		}
		
	if(ok==1){
		if(validate(st)!=false){;
		   document.forms[0].submit();
		}
	}
}

function CheckNumeric(){
	var kc = event.keyCode;
    if(kc < 48 | kc > 57){
	   alert("Postal code must consist of only numeric values.");	
    }
}

function validate(step){
var stp=step;

if(stp==1){
		return true;
}
else if(stp==2){
	if(document.affiliation.specialty1.value==""){
	        alert("You must enter  at least one specialty describing your role in your institution.");
			return false;
	}
	else{
		return true;
	}
}
else{
   return true;	 
}
}

//-->