Error in Javascript

Code that is causing problem is in first field of the form below TOTAL, called "TSM"

This is the error:  Syntax error: missing ) before condition 9 at line 8

This is a link to a usable form (I think)  https://workspaces.acrobat.com/?d=eHgoPUbA1ZDY0TyH3CcHRQ

This is the code

var c = this.getField("TM")                                         //Gets total mileage from field "TM"

var d = this.getField("StandardCost")                        //Gets dollar amount from "StandardCost"

var e = this.getField("Cb")                                         //Gets value of Checkbox

if ((event.e.value = No)||(event.d.value!=0)){            //If the Checkbox is not checked and there the fee is greater than zero; Mileage X cost = "TSM"

event.value =c.value * d.value;

}

    else if{

      ((event.e.value = No)||(event.d.value=0)){           // if the fee is zero and Checkbox is not checked there is no value

            event.value = "";

    else if{

(event.e.value = Yes) {                                              //If the checkbox is checked the TSM field is not visible.

            TSM.hidden = true;

}