adding comments

Author: mlarghydracept

lib/addons/p5.dom.js

@@ -575,23 +575,29 @@
     }
     self.option = function(name, value) {
       var index;
+      //see if there is already an option with this name
       for (var i = 0; i < this.elt.length; i++) {
         if(this.elt[i].innerHTML == name) {
-            index = i;
-            break;
+          index = i;
+          break;
         }
       }
+      //if there is an option with this name we will modify it
       if(index !== undefined) {
+        //if the user passed in false then delete that option
         if(value === false) {
           this.elt.remove(index);
         } else {
+          //otherwise if the name and value are the same then change both
           if(this.elt[index].innerHTML == this.elt[index].value) {
             this.elt[index].innerHTML = this.elt[index].value = value;
+          //otherwise just change the value
           } else {
             this.elt[index].value = value;
           }
         }
       }
+      //if it doesn't exist make it
       else {
         var opt = document.createElement('option');
         opt.innerHTML = name;