made JS_this public

Change-Id: If4ea09db76e7b2c5683f3cdeaf1225a6524bd819
improved setHtmlImgSource

Change-Id: I0ec59dc3343cd2b40c371953879b034a54a7e34d
added todo

Change-Id: I4d0b52471f14cbff342a0a2840ce110f97f61ea4