function setPosition(r) {
        var store = {
            ram : {
                top : 0,
                left : 0,
                right : 0,
                bottom : 0
            },
            rom : {
                element: null,
                minWidth: 0,
                minHeight: 0,
                top : null,
                left : null,
                right : null,
                bottom : null
            }
        };

        for (var i in r) {store.rom[i] = r[i];}
        
        var element = document.getElementById(store.rom.element);
        
        if (!element) {
            alert("Please check the argument: 'element'.");
            return false;
        }

        for (i in store) {element[i] = store[i];}

        element.rom.move = function() {
            
            
                if (window.innerHeight) {
                    var htmlTag = document.getElementsByTagName("html")[0];
                    var topPage = window.pageYOffset;
                    var leftPage = window.pageXOffset;
                    var rightPage = leftPage + window.innerWidth - element.offsetWidth;
                    if (htmlTag.scrollHeight > window.innerHeight) rightPage -= 17;
                    var bottomPage = topPage + window.innerHeight - element.offsetHeight;
                    if (htmlTag.scrollWidth > window.innerWidth) bottomPage -= 17;
                    var browserHeight = window.innerHeight;
                    var browserWidth = window.innerWidth;
                } else {
                    if (document.documentElement && document.documentElement.clientWidth) {
                        var topPage = document.documentElement.scrollTop;
                        var leftPage = document.documentElement.scrollLeft;
                        var browserHeight = document.documentElement.clientHeight;
                        var browserWidth = document.documentElement.clientWidth;
                    } else if (document.body) {
                        var topPage = document.body.scrollTop;
                        var leftPage = document.body.scrollLeft;
                        var browserHeight = document.body.clientHeight;
                        var browserWidth = document.body.clientWidth;
                    }
                    var rightPage = leftPage + browserWidth - element.offsetWidth;
                    var bottomPage = topPage + browserHeight - element.offsetHeight;
                }
                
                if ((browserWidth < element.rom.minWidth) || (browserHeight < element.rom.minHeight)) element.style.display = "none";
                else element.style.display = "block";
                
                element.style.position = "absolute";
            
                if (element.rom.top != null) {
                    var Condition = (Math.abs(topPage + element.rom.top - element.ram.top) < 2 || !element.firstTime);
                    if (Condition) element.ram.top = topPage + element.rom.top;
                    else element.ram.top += ((topPage + element.rom.top - element.ram.top) / 20);
                    element.style.top = element.ram.top + "px";
                }
                if (element.rom.left != null) {
                    var Condition = (Math.abs(leftPage + element.rom.left - element.ram.left) < 2 || !element.firstTime);
                    if (Condition) element.ram.left = leftPage + element.rom.left;
                    else element.ram.left += ((leftPage + element.rom.left - element.ram.left) / 20);
                    element.style.left = element.ram.left + "px";
                }
                if (element.rom.right != null) {
                    var Condition = (Math.abs(rightPage - element.rom.right - element.ram.right) < 2 || !element.firstTime);
                    if (Condition) element.ram.right = rightPage - element.rom.right;
                    else element.ram.right += ((rightPage - element.rom.right - element.ram.right) / 20);
                    element.style.left = element.ram.right + "px";
                }
                if (element.rom.bottom != null) {
                    var Condition = (Math.abs(bottomPage - element.rom.bottom - element.ram.bottom) < 2 || !element.firstTime);
                    if (Condition) element.ram.bottom = bottomPage - element.rom.bottom;
                    else element.ram.bottom += ((bottomPage - element.rom.bottom - element.ram.bottom) / 20);
                    element.style.top = element.ram.bottom + "px";
                }
                element.firstTime = true;
                setTimeout("document.getElementById('"+element.id+"').rom.move()", 20);
                
        };
        element.rom.move();
    };  

setPosition({element: "a", top: 0, right: 0});
setPosition({element: "b", top: 0, left: 0});