frames.php
public function getMimeType()
    {
        if (is_integer($this->focus)) {
            return $this->frames[$this->focus]->getMimeType();
        }

        return $this->frameset->getMimeType();
    }
public function getMimeType()
    {
        if (is_integer($this->focus)) {
            return $this->frames[$this->focus]->getMimeType();
        }

        return $this->frameset->getMimeType();
    }
Accessor for current MIME type.

@return string    MIME type as string; e.g. 'text/html'