Merging video in project

I pasted short video in my projects and i need simple manipulating with it by scrolling my page. But when all page is downloaded and i can scroll it, i can see, how roller runs over my movie, but picture doesnt change.

i have the following code:

var animationHeight = 9000;

var stageHeight = sym.$("Stage").height();

var scrollPos = sym.$("Stage").scrollTop();

sym.$("body").append(sym.$("txt").css({"top":scrollPos}));

document.getElementById("Stage_movie_1").style.top=scrollPos + "px";

var duration = sym.getDuration();

var percent = scrollPos / (animationHeight - stageHeight);

var time = duration * percent;

// Update timeline

sym.stop(time);

var percent_1=Math.max(0,Math.min(1,(percent-0.3)*10));

var time_1 = Math.round(3413 * percent_1);

if(time_1>0){

document.getElementById("Stage_movie_1").currentTime=(time_1/1000);

document.getElementById("Stage_movie_1").play;

document.getElementById("Stage_movie_1").pause;

}

on this page:

Scrolling Banner

I would be glad if someone finds out how to make correct controls!