Attaches event to dhtmlxForm instance.

Parameters:

• evName - the event name;
• evHandler - a user-defined handler that will be called when event occurs.

var myEvent = myForm.attachEvent("onChange", function(){
   // code here
});

Description:

• several handlers can be attached to one and the same event, and all of them will be executed.
• event names are case-insensitive.

See also:

• detachEvent()