(function($) {
$.fn.shadowEnable = function() { return $(this).find("+ .fx-shadow").show().end(); };
$.fn.shadowDisable = function() { return $(this).find("+ .fx-shadow").hide().end(); };
$.fn.shadowDestroy = function() { return $(this).find("+ .fx-shadow").remove().end(); };
$.fn.shadow = function(options) {
options = $.extend({
offset: 1,
opacity: 0.2,
color: "#000",
monitor: false
}, options || {});
options.offset -= 1;
return this.each(function() {
 var $element = $(this).shadowDestroy(),
 $shadow = $("<div class='fx-shadow' style='position: relative;'></div>").hide().insertAfter($element);
 baseWidth = $element.outerWidth(),
baseHeight = $element.outerHeight(),
 position = $element.position(),
 zIndex = parseInt($element.css("zIndex")) || 0;
 $('<div class="fx-shadow-color fx-shadow-layer-1"></div>').css({ position: 'absolute', opacity: options.opacity - 0.05, left: options.offset, top: options.offset, width: baseWidth + 1, height: baseHeight + 1 }).appendTo($shadow);
$('<div class="fx-shadow-color fx-shadow-layer-2"></div>').css({ position: 'absolute', opacity: options.opacity - 0.10, left: options.offset + 2, top: options.offset + 2, width: baseWidth, height: baseHeight - 3 }).appendTo($shadow);
$('<div class="fx-shadow-color fx-shadow-layer-3"></div>').css({ position: 'absolute', opacity: options.opacity - 0.10, left: options.offset + 2, top: options.offset + 2, width: baseWidth - 3, height: baseHeight }).appendTo($shadow);
$('<div class="fx-shadow-color fx-shadow-layer-4"></div>').css({ position: 'absolute', opacity: options.opacity, left: options.offset + 1, top: options.offset + 1, width: baseWidth - 1, height: baseHeight - 1 }).appendTo($shadow);
 $("div.fx-shadow-color", $shadow).css("background-color", options.color);
  $element
.css({
zIndex: zIndex + 1,
position: ($element.css("position") == "static" ? "relative" : "")
});
  $shadow.css({
position: "absolute",
zIndex: zIndex,
top: position.top+"px",
left: position.left+"px",
width: baseWidth,
height: baseHeight,
marginLeft: $element.css("marginLeft"),
marginRight: $element.css("marginRight"),
marginBottom: $element.css("marginBottom"),
marginTop: $element.css("marginTop")
}).fadeIn();
if ( options.monitor ) {
function rearrangeShadow() {
var $element = $(this), $shadow = $element.next();
 $shadow.css({
top: parseInt($element.css("top")) +"px",
left: parseInt($element.css("left")) +"px"
})
$(">*", $shadow).css({ height: this.offsetHeight+"px", width: this.offsetWidth+"px" });
}
 $element.bind("DOMAttrModified", rearrangeShadow);
 if( $shadow[0].style.setExpression ) {
$shadow[0].style.setExpression("top" , "parseInt(this.previousSibling.currentStyle.top ) + 'px'");
$shadow[0].style.setExpression("left", "parseInt(this.previousSibling.currentStyle.left) + 'px'");
}
}
});
};
})(jQuery);