var el, scroll_interval, win_vel, win_top;


function InitScroll(element,cas){
	el =  document.getElementById(element);

	win_vel = parseInt(el.offsetHeight);
	win_top = parseInt(el.style.top);
	el.style.top = win_top+"px";
	scroll_interval = setInterval("Scroll()",cas);

}



function Scroll(){

ak_top = parseInt(el.style.top);

if( win_vel == (ak_top*(-1)) ) ak_top = win_top;

ak_top--;
el.style.top = ak_top+"px";
rect = "rect("+(ak_top*(-1))+"px auto "+(win_top+(ak_top*(-1)))+"px 0px)";
el.style.clip = rect;


}