function show_email(form) {


//document.getElementById('email_in').style.display = 'block';
//document.getElementById('email_in2').style.display = 'block';
var myval = document.getElementById('checkem');

	if (myval.checked==true) {

		
		document.getElementById('email_in').style.display = 'block';
		document.getElementById('email_in2').style.display = 'block';
	}
	else {


		document.getElementById('email_in').style.display = 'none';
		document.getElementById('email_in2').style.display = 'none';
	}





}


function checkup(form) {

	if (form.file_.value == "")
	{
		alert( "Insert a file please" );
		form.file_.focus();
		return false ;
	
	}
	else if (form.check_email.checked == true && form.email_.value.length > 0 && CheckEmail(form.email_.value) == 1)
	{
		
    			alert( "Insert a valid email" );
    			form.email_.focus();
    			return false ;
		

		

	}

	

		document.getElementById('div_loading').style.display = 'block';
	

 return true;

}


function CheckEmail(email) {

AtPos = email.indexOf("@")
StopPos = email.lastIndexOf(".")
Message = ""

if (email == "") {
return 1;

}

if (AtPos == 0) {
return 1;
}

if (AtPos == -1 || StopPos == -1) {
return 1;
}

if (StopPos < AtPos) {
return 1;
}

if (StopPos - AtPos == 1) {
return 1;
}

return 0;

}