Replying to Adding pictures in form

Ok i know all the html stuff bla bla bla.. i read it in help, but do u use the adress of the page the photo is on? or du u sum how get and adress for just the pic? if so how do u get just the pics web adress?
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THE POWER IS YOURS

Our world is in peril. Gaia, the Spirit of the Earth, can no longer stand the terrible destruction plagueing our planet. She sends five magic rings to five special young people: Kwame, from Africa, with the power of Earth. From North America, Wheeler, with the power of Fire. From Eastern Europe, Linka, with the power of Wind. From Asia, Gi, with the power of Water. And from South America, Ma-Ti, with the power of Heart. When the five powers combine, they summon Earth's greatest champion, Captain Planet!