function waitForm () {
	name = document.upload.upload_name.value;
	email = document.upload.upload_email.value;
	recipient = document.upload.upload_recipient.value;
	file = document.upload.upload_file1.value;
		
	if(name != '' && email != '' && recipient != '0' && file != '') {
		document.getElementById("blackscreen").style.display = "block";
		document.getElementById("blackscreen_text").style.display = "block";
		document.upload.submit();
	} else {
		alert('You must fill in your Name, eMail, a recipient and a file!');
		return false;
	}
}

function loadForm () {
	//get total number of fields
	var number_of_fields = parseInt(document.upload.number_upload_fields.value);

	//set all excepting one field to display: none
	for(var i= parseInt(document.upload.java_fields.value); i <= number_of_fields;i++) {
		eval("document.getElementById('upload_field"+ i +"').style.display = 'none'");
	}
}

function increase_fields() {
	var actual_fields = parseInt(document.upload.java_fields.value)

	eval("document.getElementById('upload_field"+ actual_fields +"').style.display = 'block'");
	
	document.upload.java_fields.value = actual_fields + 1;
}

function decrease_fields() {
	var actual_fields = parseInt(document.upload.java_fields.value) -1;
	
	document.upload.java_fields.value = actual_fields;	
	
	eval("document.getElementById('upload_field"+ actual_fields +"').style.display = 'none'");
}

function check() {
	if(document.upload.number_upload_fields.value == document.upload.java_fields.value) {
		return true;
	} else {
		return false;
	}
}