function ControllaTextArea(form_name,campo,ta_max_digit)
{
	ta_n_digit = document.forms[form_name].elements[campo.name].value.length;
	document.forms[form_name].elements[campo.name +'_len'].value = ta_max_digit - ta_n_digit;
	if (document.forms[form_name].elements[campo.name +'_len'].value < 0)
	{
		document.forms[form_name].elements[campo.name].value = document.forms[form_name].elements[campo.name].value.substring(0,ta_max_digit);
		document.forms[form_name].elements[campo.name +'_len'].value = '0';
	}
}

function pop (url,w,h,s,f) {
LeftPosition =(screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
window.open(url,'new','width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+s+',fullscreen='+f+'')
}

function popscroll (url,w,h) {
LeftPosition =(screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
window.open(url,'new','width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars=yes')
}