The previous answer will only remove every second image.
Remember NodeLists returned by getElementsByTagName or other DOM methods are ‘live’. That means when you remove image 0, images 1–n move down to 0–(n-1); this is a ‘destructive iteration’.
To avoid this, either make a static Array copy of the NodeList (as the jQuery answer is effectively doing), or, faster, just iterate the list backwards:
for (var i= document.images.length; i-->0;)
document.images[i].parentNode.removeChild(document.images[i]);
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…