aspHide

jQuery.fn.innerWrap = function() {
	var a, args = arguments;
	return this.each(function() {
		if (!a)
			a = jQuery.clean(args, this.ownerDocument);
		// Clone the structure that we're using to wrap
		var b = a[0].cloneNode(true),
		    c = b;
		// Find the deepest point in the wrap structure
		while ( b.firstChild )
			b = b.firstChild;
		// append the child nodes to the wrapper
		jQuery.each(this.childNodes, function(i, node) { 
			b.appendChild(node); 
		});
		jQuery(this)
			// clear the element
			.empty()
			// add the new wrapper with the previous child nodes appended
			.append(c);
	});
};
// Above code is located at http://codesnippets.joyent.com/posts/show/1736

jQuery.fn.aspHide = function() {
    $(this).each(function() {
     if ($('.safety').length == 0){
        $(this).innerWrap('<div class="safety"></div>');
     }
        $(this).data('height', $(this).height()).data('margin', {top: $(this).css('margin-top'), bottom: $(this).css('margin-bottom')});
        
        var elem = $(this).find('.safety');

        $(this, elem).height('0');
        $(this).css('margin-top', '0').css('margin-bottom', '0');
        elem.css('visibility', 'hidden');
    });
};

jQuery.fn.aspShow = function() {
    $(this).each(function() {
        var elem = $(this).find('.safety');
        elem.height($(this).data('height'));
        elem.css('margin-top',$(this).data('margin').top).css('margin-bottom',$(this).data('margin').bottom);
        elem.css('visibility', 'visible');
    });
};