function position(evt){
                var coisa = document.getElementById('coisa');
                var coisa1 = document.createElement('div');
                var x = (is.ns)? evt.pageX : window.event.x+document.body.scrollLeft;
                x = Math.floor(x/5)*5;
                var y = (is.ns)? evt.pageY : window.event.y+document.body.scrollTop;
                y = Math.floor(y/5)*5;
                loadpagepower('coisa','./position.php','x='+x+'&y='+y,'post');
                
            }
                document.onmousedown = position;