Passing JavaScript Variables to getCurrentAttribute

I believe that the way I am trying to achieve my desired result is not possible in NetSuite, but I am hoping someone may have found a workaround:

Our client has several custom item fields for swatches. Here is a Javascript snippet I am using to display the swatch (using tags):

swatch = "<%=getCurrentAttribute('item','custitemswatch2')%>";    if (swatch.length > 0) {document.write("<td><a onclick=swapImage('<%=getCurrentAttribute('item','internalid')%>','" + swatch + "')> <img width='80' height='80' src='<%=getCurrentAttribute('item','custitemswatch2')%>' alt='<%=getCurrentAttribute('item','custitemswatch2_alt')%>' title='<%=getCurrentAttribute('item','custitemswatch2_alt')%>'></a></td>"); }  document.write("</tr><tr>");