var supersleight    = function() {
            
            var root = false;
            var applyPositioning = true;
            
            var shim            = 'blank.gif';
            
            var fnLoadPngs = function() {
                if (root) {
                    root = document.getElementById(root);
                }else{
                    root = document;
                }
                for (var i = root.all.length - 1, obj = null; (obj = root.all[i]); i--) {
                    if (obj.currentStyle.backgroundImage.match(/\.png/i) !== null) {
                        bg_fnFixPng(obj);
                    }
                    if (obj.tagName=='IMG' && obj.src.match(/\.png$/i) !== null){
                        el_fnFixPng(obj);
                    }
                    if (applyPositioning && (obj.tagName=='A' || obj.tagName=='INPUT') && obj.style.position === ''){
                        obj.style.position = 'relative';
                    }
                }
            };
        
            var bg_fnFixPng = function(obj) {
                var mode = 'scale';
                var bg    = obj.currentStyle.backgroundImage;
                var src = bg.substring(5,bg.length-2);
                if (obj.currentStyle.backgroundRepeat == 'no-repeat') {
                    mode = 'crop';
                }
                obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='" + mode + "')";
                obj.style.backgroundImage = 'url('+shim+')';
            };
        
            var el_fnFixPng = function(img) {
                var src = img.src;
                img.style.width = img.width + "px";
                img.style.height = img.height + "px";
                img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')";
                img.src = shim;
            };
            
            var addLoadEvent = function(func) {
                var oldonload = window.onload;
                if (typeof window.onload != 'function') {
                    window.onload = func;
                } else {
                    window.onload = function() {
                        if (oldonload) {
                            oldonload();
                        }
                        func();
                    };
                }
            };
            
            return {
                init: function() {
                    addLoadEvent(fnLoadPngs);
                },
                
                limitTo: function(el) {
                    root = el;
                },
                
                run: function() {
                    fnLoadPngs();
                }
            };
        }();
        
        
        supersleight.init();