[caetus]

<button id="but">click</button>


<script>
	var but = document.getElementById('but')

	but.addEventListener('mousedown', function () {
		var data = new Date();
			but.addEventListener('mouseup', function fn () {
				if(new Date() - data > 3000) alert(2)

				but.removeEventListener('mouseup', fn, false)

			},false)
	},false)
</script>