function verificar(ObjForm,pagina){
	var Email = /^[\w-]+(\.[\w-]+)*@(([\w-]{2,63}\.)+[A-Za-z]{2,6}|\[\d{1,3}(\.\d{1,3}){3}\])$/;
	switch(pagina){
		case 1:
			if(ObjForm.txtNome.value=="" || ObjForm.txtMail.value=="" || ObjForm.txtMensagem.value==""){
				alert('All fields are required!');
				return false
			}
			if(Email.test(ObjForm.txtMail.value)==false){
				alert('The e-mail address information is not valid. Correct it!');
				return false
			}
			break
		case 2:
			if(ObjForm.txtNome.value=="" || ObjForm.txtMail.value=="" || ObjForm.txtLogin.value=="" || ObjForm.txtSenha.value==""){
				alert('The fields for name, email, and login senhão are required to fill!');
				return false
			}
			if(ObjForm.txtSenha.value!=ObjForm.txtSenha2.value){
				alert('Passwords informed are not identical. Correct them!');
				return false
			} 
			if(Email.test(ObjForm.txtMail.value)==false){
				alert('The e-mail address information is not valid. Correct it!');
				return false
			}
			break
		case 3:
			if(ObjForm.txtLogin.value=="" || ObjForm.txtSenha.value==""){
				alert('All fields are required!');
				return false
			}
			break
	}
	return true	
}