var current_count = 0;
var max_count = 500;

function textCounter(field, target) {
  if (field.value.length > max_count) {
    field.value = field.value.substring(0, max_count);
  } else {
    current_count = max_count - field.value.length;
    target.value = current_count;
  }
}

function abreRadio() {
	window.open("http://www.ivetesangalo.com/v2/radio/","radio","toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width=450,height=350");
}