//*** This code is copyright 2003 by Gavin Kistner, gavin@refinery.com
//*** It is covered under the license viewable at http://phrogz.net/JS/_ReuseLicense.txt
//*** Reuse or modification is free provided you abide by the terms of that license.
//*** (Including the first two lines above in your source code satisfies the conditions.)


//Given a reference to an HTML object, returns the first ancestor of that element which is of type 'elementType'
//You may also supply a string for the third param, which must be found as an attribute or class of the ancestor
//If no such node is found, returns null
function FindAncestor(me, elementType, attributeOrClass) {
	if (!me || (!elementType && !attributeOrClass)) return null;

	while (me!=null){
		if ( (elementType==null || me.tagName.toLowerCase()==elementType.toLowerCase()) && (attributeOrClass==null || me.getAttribute(attributeOrClass) || me.className.indexOf(attributeOrClass)!=-1) ) return me;
		me=me.parentNode;
	}
	return null;
}


//e.g. FindAncestor(event.srcElement,'table');
//e.g. FindAncestor(event.srcElement,null,'dragParent');