Change all the double quotes for the attributes to single quotes.
$("#addSelect").click(function() {
$("#optionsForm").after("<tr> \
<td><input type="text" class="optionField" value="Options" /></td> \
<td> \
<ul class="option"> \
<li><select><option>Value..</option></select></li> \
</ul> \
</td> \
</tr>");
} );