Untitled

jQuery('<button type="button" class="btn btn-default">Download</button>').on('click', function(e) {
	var link = document.createElement('a');
	link.href = canvas.toDataURL({format: 'png', multiplier: Math.ceil(10000 / (getZoom()*canvas_exportwidth/canvas_review_width)) / 10000});
	link.download = 'download.png';
	link.style.display = 'none';
	document.body.appendChild(link);
	link.click();
	document.body.removeChild(link);
	e.preventDefault();
}).appendTo(jQuery('.div_reviewbtn'));