canAcceptCommand()

Description	Determines whether the command is appropriate for the current selection.
	Note: Do not define `canAcceptCommand()` unless it returns `FALSE` in at least one case. If the function is not defined, the command is assumed to be appropriate; making this assumption saves time and improves performance.
Arguments	None.
Returns	`TRUE` if the command is allowed; `FALSE` if it is not, dimming the command in the menu.
Example	The following instance of `canAcceptCommand()` makes the command available only when the selection is a table:

function canAcceptCommand(){
   var selArr=dreamweaver.getSelection();
   var selObj=dreamweaver.offsetsToNode(selArr[0],selArr[1]);
   return (selObj.nodeType == Node.ELEMENT_NODE && selObj.tagName=="TABLE");
}