計時器setTimeout()
<!DOCTYPE?html> <html> <head> <meta?charset="UTF-8"> <title>定時器</title> <script?type?=?"text/Javascript"> //開始計時的函數 function?clock(){ var?time?=?new?Date(); var?attime=time.getHours()+":"+time.getMinutes()+":"+time.getSeconds(); ????document.getElementById("clock").value?=?attime; } //定義函數clock2(),實現點擊Start按鈕后延遲5秒打開百度在首頁 function?clock2(){ setTimeout(window.open("http://www.baidu.com","_blank","width=600px,height=400px"),5000); } //每隔100毫秒調用函數clock(),并將返回值賦給變量i var?i?=?setInterval("clock()",1000); </script> </head> <body> <form> <input?type="text"?id="clock"?size="4"??/> ?????<input?type="button"?value="Stop"?onclick="clearInterval(i)"/><br> ?????<input?type?=?"button"?value?=?"Start"?onclick?=?"clock2()"/> ??</form> </body> </html>
函數clock2()要實現的功能是點擊Start按鈕后延遲5秒打開百度。執行完之后怎么不延遲直接打開了呢?
2017-01-16
個人理解:點擊這個動作是即時的,而setTimeout是延時,兩者并不能用在一起
2017-01-12
var?i?=?setInterval("clock()",1000); 換成var?i?=?setInterval("clock",1000);