要完成此效果把如下代碼加入到<body>區(qū)域中
<form name=forms> <font size=3><CENTER><div align=center><p></font><font color=red size=3>您在本頁停留了</font><font color=#80FF80>
<br> <input type=text name=input1
size=10></font></p></div></center></font><script language=javascript><!--
var sec=0;var min=0;var hou=0;flag=0;idt=window.setTimeout("update();",1000);function
update(){sec++;if(sec==60){sec=0;min+=1;}if(min==60){min=0;hou+=1;}if((min>0)&&(flag==0)){window.
alert("你已經(jīng)在本頁停留了1分鐘!");flag=1;}
document.forms.input1.value=hou+"時"+min+"分"+sec+"秒";idt=window.setTimeout("update();",1000);}
//-->
</script></form>
