สอบถามการดึงรหัสมาใช้แบบ Multiple Dynamic CreateElement Input File ค่ะ

<script language="javascript">
	function fncCreateElement(){
		
	   var mySpan = document.getElementById('mySpan');

	   var myLine = document.getElementById('hdnLine');
	   myLine.value++;

	   // Create input text
	   var myElement6 = document.createElement('input');
	   myElement6.setAttribute('type',"txt");
	   myElement6.setAttribute('name',"txtproject"+myLine.value);
	   myElement6.setAttribute('id',"txt"+myLine.value);
	   mySpan.appendChild(myElement6);	
	   
	
	   
	   
	   var myElement4 = document.createElement('input');
	   myElement4.setAttribute('type',"text");
	   myElement4.setAttribute('name',"txtGalleryName12"+myLine.value);
	   myElement4.setAttribute('id',"txt"+myLine.value);
	   mySpan.appendChild(myElement4);	
	   
	   var myElement5 = document.createElement('input');
	   myElement5.setAttribute('type',"text");
	   myElement5.setAttribute('name',"txtcost1"+myLine.value);
	   myElement5.setAttribute('id',"txt"+myLine.value);
	   mySpan.appendChild(myElement5);	
	   
	   var myElement7 = document.createElement('input');
	   myElement7.setAttribute('type',"text");
	   myElement7.setAttribute('name',"txtcost2"+myLine.value);
	   myElement7.setAttribute('id',"txt"+myLine.value);
	   mySpan.appendChild(myElement7);
		
       // Create <br>
	   var myElement3 = document.createElement('<br>');
	   myElement3.setAttribute('id',"br"+myLine.value);
	   mySpan.appendChild(myElement3);
	}

	function fncDeleteElement(){

		var mySpan = document.getElementById('mySpan');

		var myLine = document.getElementById('hdnLine');
		
		if(myLine.value > 0 )
		{

			// Remove input text
			var deleteFile = document.getElementById("txt"+myLine.value);
			mySpan.removeChild(deleteFile);
			
			var deleteFile = document.getElementById("txt"+myLine.value);
			mySpan.removeChild(deleteFile);
			
			var deleteFile = document.getElementById("txt"+myLine.value);
			mySpan.removeChild(deleteFile);
		
			
			var deleteFile = document.getElementById("txt"+myLine.value);
			mySpan.removeChild(deleteFile);
			
						
			

			// Remove <br>
			var deleteBr = document.getElementById("br"+myLine.value);
			mySpan.removeChild(deleteBr);

			myLine.value--;
		}
	}
</script>
<table width="85%" border="1" align="left">
    <tr>
      <td><input name="txtproject" type="text" id="txtproject" value="<?php echo $row_Recordset1['Project_ID']; ?>" />
        <input name="txtpersonID" type="text" >
		<input name="txtcost1" type="text" size="10" />
		<input name="txtcost2" type="text" id="txtcost2" size="10" />
		<input name="btnCreate" type="button" value="+" onClick="JavaScript:fncCreateElement();">
		<input name="btnDelete" type="button" value="-" onClick="JavaScript:fncDeleteElement();">
		<br>	
		<span id="mySpan"></span>
		<input name="hdnLine" type="hidden" value="0">
		<input name="btnSubmit" type="submit" value="Submit"></td>
    </tr>
  </table>