HA! Mam to, tag IFRAME je potrebne rozsirit o tag height (vyska)
z:
<iframe src="index_subory/anketa_0.htm" frameborder="0" height="155" scrolling="no" width="130">na:
<iframe height="330" src="index_subory/anketa_0.htm" frameborder="0" height="155" scrolling="no" width="130">