Yeah i read this in the Mobafire Wiki code guide right after you mentioned it.
I have included some :)
Too bad they didnt separate the abilities of the different stances, you always have to link them together.

You can use this code to insert icons into your guide: The name should be pretty obvious and the size is the LxH in pixels. I've found that somewhere between 50 and 60 is the closest to the icons native resolution and wont stretch it.
This is size 55.

Thank you for all the nice comments folks! I am glad it is working for you the same way it does to me. I am planning to upload some replays and screenshots from games.
Wild Ditto, can you explain me what did you mean by inserting Icons, i am not that familiar with Mobafire :)

Just used this and went 11-2-2, pretty ok for me since I'm not competitive. Nice guide.

Shock blast does proc TriForce, which is pretty much a must have on Jayce unless you are building a FM AtMog, and as well if you have tested an Arp runes set vs. a AD rune page, the AD early game rules out. You are not accounting for his ridiculous AD scaling.

I have to agree with wild ditto. Many people building jayce are using ad marks instead of the armor penetration marks which give a HUGE advantage early game and help you start to snowball and even if the enemy eventually buys a thornmail to counter you, you can simply buy a last whisper and their day is over. overall good build.

best build atm... i like to buy sheen as soon as possible, it makes jayce pretty op early game :)

Pretty good, i played with this guid and i had a good result so i am going to see anothers guids and see if this is the guid (for know this is the best guid)

I don't agree with flat attack damage seals and glyphs as they give no sustain early game like other much better choices (armor, MR per level) give. The attack damage per level quints are decent but could be replaced with something like armor penetration which makes early game much easier. Keeping normal Boots while gathering the 4000 gold it takes to build Trinity Force will put you at a serious disadvantage as anyone who upgrades their boots before you will be able to kite you around all day. I'm pretty sure that Shock Blast doesn't proc on hit effects so Trinity Force becomes a sub-par item on Jayce and the item slot would be used much better late game occupied by a Last Whisper or a Frozen Mallet. Also this guide looks rushed and you haven't used the icon tag anywhere. Taking the time to add in pictures and icons will add color to this guide and make it much more appealing to other readers.

Sorry for the wall of text. I just wanted to share some advice with a good looking guide. I'll definitely be coming back to take another look at this! Good luck!

Just pointing out you put 9 quints. :)

Just tried this one and have to say its working good.
Was against mundo on solo top and i was completly overwhelming him ;)