Mouse wheel to change the size of the image sample code < Script> The function onWheelZoom (obj) {               Zoom = parseFloat (obj. Style. Zoom);               TZoom = zoom + (event. WheelDelta> 0? 0.05, 0.05);               If (tZoom > 1 | | tZoom< 0.1) return true;               Obj. Style. Zoom = tZoom;               Return false; } < / script> < A href = “javascript: window. Close ()” > < / a>