// JavaScript Document
function validateForm(/*Argomentum: 'id1_id2_id_3_...'*/arr)
{
var tags=arr.split('_');
var alert_trig=true;
for (i=0;i<tags.length;i++)
	{
	el=document.getElementById(tags[i]);
	if (el.value=='')
		{
		el.style.backgroundColor='#FFCCCD';
		alert_trig=false;
		}
		else
		{
		el.style.backgroundColor='white';
		}
	}
return alert_trig;
}