為什么我點擊取消計時器,沒反應呢?
<!DOCTYPE?HTML> <html> <head> <meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"> <title>計時器</title> <script?type="text/javascript"> ??var?attime ???function?clock(){ ??????var?time=new?Date();??????????????? ?? ??????document.getElementById("clock").value?=?time; ???} ?i=setInterval(clock,100)???? </script> </head> <body> ??<form> ????<input?type="text"?id="clock"?size="50"??/> ????<input?type="button"?value="Stop"??/> ??</form> </body> </html>
2015-09-14