// JavaScript Document
var speed = 3;
var crossobj = document.getElementById( "content1" );
var iens6 = document.all || document.getElementById;
var ns4 = document.layers;

function movedown( id ){
	
	var content = "content" + id;
	
	crossobj = document.getElementById( content );

	if ( window.moveupvar ) {
		
		clearTimeout( moveupvar );
		
	}
	
	if ( iens6 && parseInt( crossobj.style.top ) > (contentheight*(-1)+100) ) {
		
		crossobj.style.top = parseInt( crossobj.style.top ) - speed + "px";
				
	} else {
		
		if ( ns4 && crossobj.top >= ( contentheight * ( -1 ) + 100 ) ) {
			
			crossobj.top -= speed;
			
		}
		
	}
	
	movedownvar = setTimeout( "movedown("+id+")",20 );

}

function moveup( id ){
	
	var content = "content" + id;
	
	crossobj = document.getElementById( content );
	
	if ( window.movedownvar ) {
		
		clearTimeout( movedownvar );
		
	}
	
	if ( iens6 && parseInt( crossobj.style.top ) < 0 ) {
		
		crossobj.style.top = parseInt( crossobj.style.top ) + speed + "px";
		
	} else {
		
		if ( ns4 && crossobj.top <= 0 ) {
		
			crossobj.top += speed;
			
		}
	}
	
	moveupvar = setTimeout( "moveup("+id+")", 20 );
}

function stopscroll( id ) {
	var content = "content" + id;
	
	crossobj = document.getElementById( content  );
	
	if ( window.moveupvar ) clearTimeout( moveupvar );
	
	if ( window.movedownvar ) clearTimeout( movedownvar );
}

function movetop() {
	stopscroll();
	if ( iens6 )
		crossobj.style.top = 0 + "px";
	else 
		if ( ns4 )
			crossobj.top = 0;
}

function getcontent_height() {
	
	
	speed = 3;
	crossobj = document.getElementById( "content1" );
	if( crossobj != undefined){
		iens6 = document.all || document.getElementById;
		ns4 = document.layers;
		
		if ( iens6 ) {
		
			contentheight = crossobj.offsetHeight;
		} else {
			if ( ns4 ) {
				document.nscontainer.document.nscontent.visibility = "show";
			}
		}
	}
}

window.onload = getcontent_height;