record.js

({
/*Disabling button ,condition based or dynamically on RecordView.
* AjayKumar
* custom/modules/Accounts/clients/base/views/record/reord.js
*/
    extendsFrom:'RecordView',
    initialize:function(options){
      this._super('initialize',[options]);
      this.on('render',this.makedisableButton,this);
    },
    makedisableButton:function(){ 
      var accountType,editButton,checkButton;
      editButton=this.getField('edit_button'); // passing argument as name of button
      checkButton=this.getField('check_button');
      AccountType=this.model.get('account_type');
      if (editButton && checkButton && _.isEqual(AccountType,'Customer')) {
        editButton.setDisabled(true);
        checkButton.setDisabled(true);
      }
    }, 
})