function getQuerystring(key, default_) {
  if (default_==null) default_=""; 
  key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
  var qs = regex.exec(window.location.href);
  if(qs == null)
    return default_;
  else
    return qs[1];
}
function setSelectedValue(ddl, toValue) {
	for ( i = 0; i < ddl.length; i++) {
		if (ddl.options[i].value == toValue) {
			ddl.options[i].selected = true;
			break;
		}
	}
}