var TimeoutID;
var cntrScroll = 0;

function gallery_clickLeft() {
	var gallery_marginLeft = Number(document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.substring(0,document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.indexOf('px')));
	if (gallery_marginLeft <= (-50) && cntrScroll == 0) {
			TimeoutID = setInterval("gallery_clickLeftSub()", 1);
	}
}

function gallery_clickRight() {
	var gallery_marginLeft = Number(document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.substring(0,document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.indexOf('px')));
	var gallery_width = document.getElementById( 'gallery_wrapper_index' ).offsetWidth;
	if ((gallery_marginLeft >= (-(gallery_width) + 50)) && cntrScroll == 0) {
			TimeoutID = setInterval("gallery_clickRightSub()", 1);
	}
}

function gallery_clickLeftSub() {
	var gallery_marginLeft = Number(document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.substring(0,document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.indexOf('px')));
	cntrScroll += 1;
	document.getElementById( 'gallery_wrapper_index' ).style.marginLeft =  gallery_marginLeft + 45 + 'px';
	if (cntrScroll == 19) {
		clearInterval(TimeoutID);
		cntrScroll = 0;
	}
}

function gallery_clickRightSub() {
	var gallery_marginLeft = Number(document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.substring(0,document.getElementById( 'gallery_wrapper_index' ).style.marginLeft.indexOf('px')));
	cntrScroll += 1;
	document.getElementById( 'gallery_wrapper_index' ).style.marginLeft =  gallery_marginLeft - 45 + 'px';
	if (cntrScroll == 19) {
		clearInterval(TimeoutID);
		cntrScroll = 0;
	}
}