var st_height = 300;
var st_width = 298;
var st_movepx = 3;


var st_status = 0;
var st_tmpx = 0;
var st_mpx = 0;
var st_mac = 0;
var st_ieclt = 0;
var st_ieclb = st_height;
if (navigator.userAgent.indexOf("Mac") >= 0) {
	st_ieclt -= st_movepx;
	st_ieclb -= st_movepx;
}


function ie_st_timer() {

	if (st_status == 1 || st_status == -1) {

		st_mpx = st_status*st_movepx;

		if (st_tmpx+st_mpx <= st_maxpx && st_tmpx+st_mpx >= 0) {
			document.all[st_movelayer].style.pixelTop -= st_mpx;
			st_ieclt += st_mpx;
			st_ieclb += st_mpx;
			if (navigator.userAgent.indexOf("Mac") >= 0) {
				if (st_mac == 0 && st_status == 1) {
					st_ieclt += st_movepx*2;
					st_ieclb += st_movepx*2;
					st_mac = 1;
				} else if (st_mac == 1 && st_status == -1) {
					st_ieclt -= st_movepx*2;
					st_ieclb -= st_movepx*2;
					st_mac = 0;
				}
			}
			document.all[st_movelayer].style.clip = 'rect('+st_ieclt+' '+st_width+' '+st_ieclb+' 0)';
			st_tmpx += st_mpx;
		}

	}

}


function nn_st_timer(){

	switch (st_status) {
	case 1:
	case -1:

		st_mpx = st_status*st_movepx;

		if (st_tmpx+st_mpx <= st_maxpx && st_tmpx+st_mpx >= 0) {
			document.layers[st_movelayer].moveBy(0,-st_mpx);
			document.layers[st_movelayer].clip.top += st_mpx;
			document.layers[st_movelayer].clip.bottom += st_mpx;
			st_tmpx += st_mpx;
		}

	break;
	}

}


function nn6_st_timer() {

	switch (st_status) {
	case 1:
	case -1:

		st_mpx = st_status*st_movepx;

		if (st_tmpx+st_mpx <= st_maxpx && st_tmpx+st_mpx >= 0) {
			document.getElementById(st_movelayer).style.top = parseInt(document.getElementById(st_movelayer).style.top) - st_mpx*2;
			st_ieclt += st_mpx*2;
			st_ieclb += st_mpx*2;
			document.getElementById(st_movelayer).style.clip = 'rect('+st_ieclt+' '+st_width+' '+st_ieclb+' 0)';
			st_tmpx += st_mpx*2;
		}

	break;
	}

}