สอบถามเรื่อง การ ดึง Script ครับ

<input style="display:none" " type="text" placeholder=""  id = '1' name = '1' class="form-control a  input-xs " value="<?php echo $b ?>"></td>
<input style="display:none" " type="text" placeholder=""  id = '2' name = '2' class="form-control b  input-xs " value="<?php echo $c ?>"></td>
<input style="display:none" " type="text" placeholder=""  id = '3' name = '3' class="form-control d  input-xs " value="<?php echo $d ?>"></td>

<script>
	var timeleft = 5;
	var downloadTimer = setInterval(add,1000);
	function add()
	{
		var dim = document.getElementById("1");
		timeleft -= 1;
		console.log(dim.value);	
		if(timeleft <= 0)
		clearInterval(downloadTimer);		
	}
	
</script>