要完成此效果把如下代码加入到<body>区域中

<form name=forms> <font size=3><CENTER><div align=center><p></font><font color=red size=3>您在本

页停留了</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(“你已经在本页停留了1分钟!”);flag=1;}

document.forms.input1.value=hou+”时”+min+”分”+sec+”秒”;idt=window.setTimeout(“update();”,1000);}

//–>

</SCRIPT></form>