Create an iframe with an empty src that's a standards compliant alternative to “#”

Question

I have an iframe on a page that I need to initially have a blank src for, as I eventually set the src with javascript.

I had been using a however have encountered an is

Answer 1

One of the linkers in Google Web Toolkit contains a dynamically created iframe. They use javascript:'' as a temporary placeholder for the src attribute. The reason, according to the source comments, is "Prevents mixed mode security in IE6/7.".

Source.