<script language='javascript'> <!-- /* Written by: * Terry Yuen. * Works inspired by Tendertron cartoons. * "This one's for the kids!" * prelevato e spiegato su http://www.web-link.it */ var ITEM_COUNT = 6; //number of flakes visible per time var ITEM_W = 20; //width of a single flake var ITEM_H = 20; //height of a single flake var ITEM_SRC = "star.gif"; var ITEM_STAGES = 4; //number of life stages for a single flake. (i.e., number of states on the "star.gif") var ITEM_TRAVEL = 20; //number of times to move a flake before disappearing (Note: PIXEL MOVED = ITEM_TRAVEL * ITEM_INCREMENT) var ITEM_INCREMENT = 4; //distance to move a flake on each loop var ITEM_SPEED = 50; //time delay in milliseconds before looping (def: 40) // END CONFIGURABLE CONSTANTS var IE_ENGINE = (document.all) ? true : false; var NS_ENGINE = (document.layers) ? true : false; var animatorThread = null; // To prevent a new flake from being created // on each loop time, we give it a sleep counter // that increments. var sprawnSleeping = 0; // Stores the position of mouse. var mousePos = new Array(2); mousePos[0] = 0; mousePos[1] = 0; // Stores previous positions of mouse. // So that we don't create a flake when // the mouse hasn't moved. var oldMousePos = new Array(2); oldMousePos[0] = 0; oldMousePos[1] = 0; // A table of flake positions and information. var trailMatrix = new Array(ITEM_COUNT); for(var i=0; i<trailMatrix.length; i++) { trailMatrix[i] = new Array(5); trailMatrix[i][0] = 0; trailMatrix[i][1] = 0; trailMatrix[i][2] = 0; trailMatrix[i][3] = ITEM_STAGES; trailMatrix[i][4] = "mouseTrailer_" + i; document.writeln((IE_ENGINE) ? '<DIV ID="' + trailMatrix[i][4] + '" STYLE="position:absolute; width:'+ITEM_W+'px; height:'+ITEM_H+'px; visibility:hidden;"><img src="'+ITEM_SRC+'" border=0></DIV>' : (NS_ENGINE) ? '<LAYER ID="' + trailMatrix[i][4] + '" position="absolute" width='+ITEM_W+' height='+ITEM_H+' visible="hide"><img src="'+ITEM_SRC+'" border=0></LAYER>' : ""); } function storeMousePos(e) { mousePos[0] = (IE_ENGINE) ? event.clientX+document.body.scrollLeft : (NS_ENGINE) ? e.pageX : 0; mousePos[1] = (IE_ENGINE) ? event.clientY+document.body.scrollTop : (NS_ENGINE) ? e.pageY : 0; } function sprawnNewTrail() { if(oldMousePos[0] != mousePos[0] || oldMousePos[1] != mousePos[1]) { var temp = trailMatrix[trailMatrix.length-1][4]; for(var i=trailMatrix.length-1; i>0; i--) { trailMatrix[i][0] = trailMatrix[i-1][0]; trailMatrix[i][1] = trailMatrix[i-1][1]; trailMatrix[i][2] = trailMatrix[i-1][2]; trailMatrix[i][3] = trailMatrix[i-1][3]; trailMatrix[i][4] = trailMatrix[i-1][4]; } trailMatrix[0][0] = mousePos[0]; trailMatrix[0][1] = mousePos[1]; trailMatrix[0][2] = ITEM_TRAVEL; trailMatrix[0][3] = ITEM_STAGES; trailMatrix[0][4] = temp; //id for trailer layer } oldMousePos[0] = mousePos[0]; oldMousePos[1] = mousePos[1]; } function animateTrail() { for(var i=0; i<trailMatrix.length; i++) { if(trailMatrix[i][2] > 0) { trailMatrix[i][1] += ITEM_INCREMENT; trailMatrix[i][2]--; trailMatrix[i][3] = Math.ceil((trailMatrix[i][2] * ITEM_STAGES) / ITEM_TRAVEL); updateTrail(trailMatrix[i][4], trailMatrix[i][0], trailMatrix[i][1], trailMatrix[i][3]); } else { hideTrail(trailMatrix[i][4]); } } sprawnSleeping++; if(sprawnSleeping >= 2) { //We create a new flake every 2 loops sprawnSleeping = 0; sprawnNewTrail(); } } function updateTrail(obj, x, y, stage) { var imgTop = (ITEM_STAGES - stage) * ITEM_H; if(IE_ENGINE) { document.all[obj].style.clip = "rect("+imgTop +" "+ ITEM_W +" "+ (imgTop+ITEM_H)+" 0)"; document.all[obj].style.left = x; document.all[obj].style.top = y - imgTop; document.all[obj].style.visibility = "visible"; } else if(NS_ENGINE) { document.layers[obj].clip.top = imgTop; document.layers[obj].clip.bottom = imgTop + ITEM_H; document.layers[obj].left = x; document.layers[obj].top = y - imgTop; document.layers[obj].visibility = "show"; } } function hideTrail(obj) { if(IE_ENGINE) { document.all[obj].style.visibility = "hidden"; } else if(NS_ENGINE) { document.layers[obj].visibility = "hide"; } } function init() { if(NS_ENGINE)document.captureEvents(Event.MOUSEMOVE); if(IE_ENGINE || NS_ENGINE) { document.onmousemove = storeMousePos; animatorThread = setInterval("animateTrail()", ITEM_SPEED); } } function end() { if(animatorThread != null) { clearInterval(animatorThread); animatorThread = null; } } //--> </script>

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