How do I get the ID of a table cell within a certain row?

How do I get the ID of a table cell within a certain row?

I have this drop down list inside a table cell and I have manage to set a certain colour on the row depending on which colour is selected within the drop down list:

  2. $("select").change(function () {
  3.                 if (this.value == "Default") {
  4.                     $(this).parents(".options").removeClass("default green blue red");
  5.                     //Get ID of previous cell and do something 
  6.                 }
  7.                 else if (this.value == "Green") {
  8.                     $(this).parents(".options").removeClass("default green blue red").addClass("green");
  9.                    //Get ID of previous cell and do something 
  10.                 }
  11.                 else if (this.value == "Blue") {
  12.                     $(this).parents(".options").removeClass("default green blue red").addClass("blue");
  13.                     //Get ID of previous cell and do something 
  14.                 }
  15.                 else if (this.value == "Red") {
  16.                     $(this).parents(".options").removeClass("default green blue red").addClass("red");
  17.                     //Get ID of previous cell and do something 
  18.                 }
  19. });
Now I need to get the id of the table cell before the table cell that holds the drop down list:

  1. <tr class="options">
    <td>Col 1</td>
     <td>Col 2</td>
    <td>Col 3</td>
     <td>Col 4 </td>
    // Get the ID of td with class "imgIcon"
     <td class="imgIcon" id="GridView1_imgIcon_1">Col 5 </td>
     <td>
     <select name="GridView1$ctl02$ctl01">
         <option value="Default">Default</option>
         <option value="Green">Green</option>
         <option value="Blue">Blue</option>
         <option value="Red">Red</option>
    </select>
     </td>
    </tr>

The class in the table cell are named "imgIcon", but I need to get the ID. In the sample I'm only showing one row but there are several rows so every ID inside the table cell are created dynamically, so the ID varies for every new row. 

So the change function determines which row we're currently on, but I need to get the ID of the table cell before the table cell holding the drop down list. Is there a way to determine the current ID for that cell?

Since the class for the td are the same all the time, could I then use it to determine the ID?