function validation()
{	  
	var fields,error;
	error = '';
	fields=document.register.elements;
	var i=0;
	while(fields[i].id!='submit')
	{
		if(fields[i].value=='')
		{
			if(msgs_validation[fields[i].id]){
			error = error+'* '+msgs_validation[fields[i].id]+'! \n ';
			}
		}
		i++;	
		
	}


	if(fields[i].value=='')
	{
		if(msgs_validation[fields[i].id])
		{
			error = error+'* '+msgs_validation[fields[i].id]+'! \n ';
		}
	}
	if(error)
	{		
		alert(error);
		return false;
	}
	else
	{
		return true;
	}
}