val: setting should check to see if this.value is a function so plugins can use it

[DylanGreene]

Currently val uses this to set the value

this.value = value;

This means plugin authors can't easily use val because we can't run a function when the value is changed.

This change would make it so that if this has a setter function it will use it:

if ( jQuery.isFunction( this.value ) )
 this.value( value );
else
 this.value == value;

The same change should happen for the getter.

[flesler]

val does a lot of things, we'd need to add this check many times. For this case (just setting the value) you can use .attr() which is actually a faster way.

attr() supports functions. I think this enhancement is not needed.

Can you provide a test case that shows a real need for this, and that attr() can't be used ?