If you're also perhaps looking for a way of doing this without javascript enabled, and have access to modify the iframe HTML, then you could add this reload code to the <head> tag of the iframe HTML:
<meta http-equiv="refresh" content="600">
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
