var speed = 40
var deg = 5
var m;

//===========================================
function stopm()
{
	clearInterval(m);
}

//===========================================
function up(thelayer)
{
	var rx = document.getElementById(thelayer).style.top;
	var rxi = parseInt(document.getElementById(thelayer).style.top);
	rxi =  rxi + deg;
	rx = rxi+'px';
	//document.getElementById('forminfo').value = rxi;
	if(parseInt(document.getElementById(thelayer).style.top) < 0)
		document.getElementById(thelayer).style.top = rx;
}

//===========================================
function down(thelayer)
{
	//if(parseInt(document.getElementById(thelayer).style.top)>0)
	var rx = document.getElementById(thelayer).style.top;
	var rxi = parseInt(document.getElementById(thelayer).style.top);
	rxi =  rxi - deg;
	rx = rxi+'px';
	document.getElementById(thelayer).style.top = rx;
}


//to use functions
//Ex: onMouseOver="moveup('mylayer')
//===========================================
function moveup(lay) 
{
	m = setInterval("up('"+lay+"')", speed);
}

//===========================================
function movedown(lay)
{
	m = setInterval("down('"+lay+"')", speed);
}