dear prof hwang,

can you allow iframe codes to embed in your forum. :)

[code]<iframe width="750" height="750" src="https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_projectile2cannon/projectile2cannon_Simulation.xhtml" frameborder="0"></iframe>[/code]

i can upload all my ejss model and scr here in the collaborative forum