php - xmlhttp.responseText to html code -

i trying display xmlhttp.responsetext html code , fill dropdownbox, seems processed string , not html code.

i using code display in html format various menu <option>s in <span> tag

javascript code within xmlhttprequest function:

document.getelementbyid("test").innerhtml=xmlhttp.responsetext; 

code in html found within dropdown menu:

< span id="test">  < /span> 

the php file called xmlhttprequest echo's following:

$option="<option>"; 

(this in while loop)

{     echo  $option.$row['productname'].$option="<option>"; } 

if want html outcome use html, don't use special chars.

in loop use

echo "<option>" . $row['productname'] . "</option>";