// JavaScript Document
function validar(){ 
	var NanePrefix = document.form.selectNanePrefix.options[document.form.selectNanePrefix.selectedIndex].value;
	var country = document.form.selectCountry.options[document.form.selectCountry.selectedIndex].value;
	if(NanePrefix == "0"){
		alert("You must enter name prefix");
		document.form.selectNanePrefix.focus();
		return;
	}
	
	if(document.form.firtsName.value == ""){
		alert("You must enter First Name");
		document.form.firtsName.focus();
		return;
	}
	
	if(document.form.lastName.value == ""){
		alert("You must enter Last Name");
		document.form.lastName.focus();
		return;
	}
	
	
	if(document.form.title.value == ""){
		alert("You must enter title");
		document.form.title.focus();
		return;
	}
	
	
	if(document.form.institucion.value == ""){
		alert("You must enter institucion");
		document.form.institucion.focus();
		return;
	}
	
	
	if(document.form.phone.value == ""){
		alert("You must enter phone");
		document.form.phone.focus();
		return;
	}
	
	if(document.form.email.value == ""){
		alert("You must enter email");
		document.form.email.focus();
		return;
	}
	
	if(document.form.address.value == ""){
		alert("You must enter address");
		document.form.address.focus();
		return;
	}
	
	if(document.form.city.value == ""){
		alert("You must enter city");
		document.form.city.focus();
		return;
	}
	
	if(country == "0"){
		alert("You must choose country");
		document.form.selectCountry.focus();
		return;
	}
	
	if(document.form.paperTitle.value == ""){
		alert("You must enter paper title");
		document.form.paperTitle.focus();
		return;
	}
	
	if(document.form.autor_1.value == "" && document.form.autor_2.value == "" && document.form.autor_3.value == "" && document.form.autor_4.value == ""){
		alert("You must enter author");
		document.form.autor_1.focus();
		return;
	}
	
	if(document.form.document_1.value == ""){
		alert("You must attach a file");
		document.form.document_1.focus();
		return;
	}
	
	
	
	
	
	document.form.formCall.value = "1";
	
	document.form.action = "enviar_1.php";
	document.form.submit();
}