function valida_form(f) {

   var i;

  // Ver uma string qq

  if (f.elements["nome"].value == "") {
	    f.elements["nome"].focus();
	    alert("Por favor introduza o seu nome.")
    return false;
  }

  if (f.elements["apelido"].value == "") {
	    f.elements["apelido"].focus();
	    alert("Por favor introduza o seu apelido.")
    return false;
  }

  if (f.elements["local"].value == "") {
	    f.elements["local"].focus();
	    alert("Por favor introduza qual o seu local de trabalho.")
    return false;
  }

   	if (f.elements["morada"].value == "") {
    	f.elements["morada"].focus();
	    alert("Por favor introduza a sua morada.")
    return false;
  }
 
   	if (f.elements["codpostal"].value == "") {
    	f.elements["codpostal"].focus();
	    alert("Por favor introduza o código postal.")
    return false;
  }
	
   	if (f.elements["localidade"].value == "") {
    	f.elements["localidade"].focus();
	    alert("Por favor introduza a localidade.")
    return false;
  }

	if (f.elements["especialidade"].value == "") {
	    f.elements["especialidade"].focus();
	    alert("Por favor indique qual a sua especialidade.")
    return false;
  }
 	
 	if (f.elements["cedula"].value == "") {
	    f.elements["cedula"].focus();
	    alert("Por favor introduza o seu nº de cédula.")
    return false;
  }
	
	if (f.elements["email"].value == "") {
			alert ("Por favor indique um endereço de E-Mail");
			f.elements["email"].focus();
			return false
		}
	
	if (f.elements["email"].value.match(/^[a-zA-Z0-9_\.\-]+@[a-zA-Z0-9_\.\-]+\.[a-zA-Z]{2,3}$/) == null) 
		{
    		alert("Por favor indique um endereço de E-Mail válido");
    		f.elements["email"].value = "";
			f.elements["email"].focus();
    		return false;
		}
  
 	return true;
}

function valida_Login(f) {

   var i;

  // Ver uma string qq
  
  if (f.elements["username"].value == "") {
	    f.elements["username"].focus();
	    alert("Por favor introduza o seu Login.")
    return false;
  }
 	return true;
}

// Script Source: CodeLifter.com
// Copyright 2003
// Do not remove this notice.

// SETUPS:
// ===============================

// Set the horizontal and vertical position for the popup

PositionX = 20;
PositionY = 20;

// Set these value approximately 20 pixels greater than the
// size of the largest image to be used (needed for Netscape)

defaultWidth  = 650;
defaultHeight = 500;

// Set autoclose true to have the window close automatically
// Set autoclose false to allow multiple popup windows

var AutoClose = true;

// Do not edit below this line...
// ================================
if (parseInt(navigator.appVersion.charAt(0))>=4){
var isNN=(navigator.appName=="Netscape")?1:0;
var isIE=(navigator.appName.indexOf("Microsoft")!=-1)?1:0;}
var optNN='scrollbars=no,width='+defaultWidth+',height='+defaultHeight+',left='+PositionX+',top='+PositionY;
var optIE='scrollbars=no,width=150,height=100,left='+PositionX+',top='+PositionY;

function popImage(imageURL,imageTitle){
if (isNN){imgWin=window.open('about:blank','',optNN);}
if (isIE){imgWin=window.open('about:blank','',optIE);}
with (imgWin.document){
writeln('<html><head><title>Loading...</title><style>body{margin:0px;}</style>');writeln('<sc'+'ript>');
writeln('var isNN,isIE;');writeln('if (parseInt(navigator.appVersion.charAt(0))>=4){');
writeln('isNN=(navigator.appName=="Netscape")?1:0;');writeln('isIE=(navigator.appName.indexOf("Microsoft")!=-1)?1:0;}');
writeln('function reSizeToImage(){');writeln('if (isIE){');writeln('window.resizeTo(100,100);');
writeln('width=100-(document.body.clientWidth-document.images[0].width);');
writeln('height=100-(document.body.clientHeight-document.images[0].height);');
writeln('window.resizeTo(width,height);}');writeln('if (isNN){');       
writeln('window.innerWidth=document.images["George"].width;');writeln('window.innerHeight=document.images["George"].height;}}');
writeln('function doTitle(){document.title="'+imageTitle+'";}');writeln('</sc'+'ript>');
if (!AutoClose) writeln('</head><body bgcolor=000000 scroll="no" onload="reSizeToImage();doTitle();self.focus()">')
else writeln('</head><body bgcolor=000000 onload="reSizeToImage();doTitle();self.focus()" onblur="self.close()">');
writeln('<img name="George" src='+imageURL+' style="display:block"></body></html>');
close();		
}}


	function ShowFile(ImgId)
	{
		var w = window.open('inc_popup.htm?ImgId=' + ImgId,'','toolbar=no,location=no,directories=no,status=no,menubar=no,width=200,height=200,resizable=no,scrollbars=yes,top=0,left=100');
	}