Google apps script to find a string and change the column background color -

i have results of google form (a google spreadsheet). write app script check each column string "yes." if column has string, change background color of column (or 1 cell in column) green. number of columns vary each time form sent need check columns used (sorry, mean send out similar form each time , want use same script on each one, except each time form used can come different number of columns-responses - corn3lius). can done in google form response spreadsheet? here code playing with. (updated code cooper's input)

function colchk(){ var ss = spreadsheetapp.getactivesheet(); var resp = ss.getdatarange().getvalues(); for(var n=0;n<resp.length;n++) {  for(var p=0;p<resp[n].length;p++) { if(resp[n][p].tostring().match(/^yes/)){ ss.getrange(n+1,p+1).setbackground('#00ff00')}}}; }     //this code works...thanks cooper! 

try this:

if(resp[n][0].tostring().match(/^yes/){ ss.getrange(n+1,1).setbackground('#00ff00') }; 

perhap's this:

function colchk(){ var ss = spreadsheetapp.getactivesheet(); var resp = ss.getdatarange().getvalues(); for(var n=0;n<resp.length;++n) {    for(var p=0;p<resp[n].length;p++)   {     if(resp[n][p].tostring().match(/^yes/){ ss.getrange(n+1,p+1).setbackground('#00ff00') };   } };