onMouseWheel Event Sample-www.51windows.Net onmousewheel event This sample uses the onmousewheel event to expand or contract the picture below. Move the cursor over the picture and roll the mouse wheel up and down.(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/webkaifa/) Size = 100%http://msdn.microsoft.com/workshop/samples/author/dhtml/refs/onmousewheelEX.htm.