PropertyMgr.createCheckBoxParam (propName, param)
create a parameter object for checkboxes

Sourcecode in PropertyMgr/objectFunctions.js:
1:   function createCheckBoxParam(propName, param) {
2:      param.name = this.__name__ + "_" + propName;
3:      param.value = 1;
4:      if (req.data[param.name] == 1 || this.getProperty(propName) == 1)
5:         param.checked = "checked";
6:      delete param.as;
7:      return param;
8:   }