20. 获得一个窗口的大小
document.body.clientWidth,document.body.clientHeight
document.body.offsetWidth,document.body.offsetHeight
有时还需要知道window.screenTop,window.screenLeft
21. 怎么判断是否是字符
if (/[^x00-xff]/g.test(s)) alert("含有汉字");
else alert("全是字符");
22.TEXTAREA自适应文字行数的多少
<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight">
</textarea>
23. 日期减去天数等于第二个日期
<script language=****>
function cc(dd,dadd)
{
//可以加上错误处理
var a = new Date(dd)
a = a.valueOf()
a = a - dadd * 24 * 60 * 60 * 1000
a = new Date(a)
alert(a.getFullYear() + "年" + (a.getMonth() + 1) + "月" + a.getDate() + "日")
}
cc("12/23/2002",2)
</script>
24. 选择了哪一个Radio
<HTML><script language="vbscript">
function checkme()
for each ob in radio1
if ob.checked then window.alert ob.value
next
end function
</script><BODY>
<INPUT name="radio1" type="radio" value="style" checked>Style
<INPUT name="radio1" type="radio" value="barcode">Barcode
<INPUT type="button" value="check" onclick="checkme()">
</BODY></HTML>
25.获得本页url的request.servervariables("")集合
Response.Write "<TABLE border=1><!-- Table Header --><TR><TD><B>Variables</B></TD><TD><B>value</B></TD></TR>"
for each ob in Request.ServerVariables
Response.Write "<TR><TD>"&ob&"</TD><TD>"&Request.ServerVariables(ob)&"</TD></TR>"
next
Response.Write "</TABLE>"
26.
本机ip<%=request.servervariables("remote_addr")%>
服务器名<%=Request.ServerVariables("SERVER_NAME")%>
服务器IP<%=Request.ServerVariables("LOCAL_ADDR")%>
服务器端口<%=Request.ServerVariables("SERVER_PORT")%>
服务器时间<%=now%>
IIS版本<%=Request.ServerVariables"SERVER_SOFTWARE")%>
脚本超时时间<%=Server.ScriptTimeout%>
本文件路径<%=server.mappath(Request.ServerVariables("SCRIPT_NAME"))%>
服务器CPU数量<%=Request.ServerVariables("NUMBER_OF_PROCESSORS")%>
服务器解译引擎<%=ScriptEngine & "/"& ScriptEngineMajorVersion &"."&ScriptEngineMinorVersion&"."& ScriptEngineBuildVersion %>
服务器操作系统<%=Request.ServerVariables("OS")%>
27.ENTER键可以让光标移到下一个输入框
<input onkeydown="if(event.keyCode==13)event.keyCode=9">
28. 检测某个网站的链接速度:
把如下代码加入<body>区域中:
<script language=****>
tim=1
setInterval("tim++",100)
b=1
var autourl=new Array()
autourl[1]="www.njcatv.net"
autourl[2]="javacool.3322.net"
autourl[3]="www.sina.com.cn"
autourl[4]="www.nuaa.edu.cn"
autourl[5]=www.cctv.com
function butt(){
document.write("<form name=autof>")
for(var i=1;i<autourl.length;i++)
document.write("<input type=text name=txt"+i+" size=10 value=测试中……> =》<input type=text name=url"+i+" size=40> =》<input type=button value=GO onclick=window.open(this.form.url"+i+".value)><br/>")
document.write("<input type=submit value=刷新></form>")
}
butt()
function auto(url){
document.forms[0]["url"+b].value=url
if(tim>200)
{document.forms[0]["txt"+b].value="链接超时"}
else
{document.forms[0]["txt"+b].value="时间"+tim/10+"秒"}
b++
}
function run(){for(var i=1;i<autourl.length;i++)document.write("<img src=http://"+autourl[I+"/"+Math.random()+" width=1 height=1 onerror=auto(http://";;;;;+autourl[I+")>")}
run()</script>
29. 各种样式的光标
auto :标准光标
default :标准箭头
hand :手形光标
wait :等待光标
text :I形光标
vertical-text :水平I形光标
no-drop :不可拖动光标
not-allowed :无效光标
help :?帮助光标
all-scroll :三角方向标
move :移动标
crosshair :十字标
e-resize
n-resize
nw-resize
w-resize
s-resize
se-resize
sw-resize
30.本地无缓存,每次自动刷新
response.expires=0
response.addHeader "pragma" , "no-cache"
response.addHeader "cache-control" , "private"
31.修改contentType并下载gif等格式
<%
function dl(f,n)
on error resume next
set s=createObject("Adodb.Stream")
S.Mode=3
S.Type=1
S.Open
s.LoadFromFile(server.mappath(f))
if err.number>0 then
response.write err.number & ":" & err.description
else
response.contentType="application/x-gzip"
response.addheader "Content-Disposition:","attachment; filename=" & n
response.binarywrite(s.Read(s.size))
end if
end function
call dl("012922501.gif","t1.gif")
%>
32. 检查一段字符串是否全由数字组成
<script language="****"><!--
function checkNum(str){return !/D/.test(str)}
alert(checkNum("1232142141"))
alert(checkNum("123214214a1"))
// --></script>