日期:2011-04-25  浏览次数:20905 次

html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>New Page 1</title>
</head>

<body>

<script language = 'javascript'>
//校验是否为英文
function checkchar()
{
  var Letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  for (i=0; i < document.form.aaa.value.length; i++)
  {
   var CheckChar = document.form.aaa.value.charAt(i);
   CheckChar = CheckChar.toUpperCase();
   if (Letters.indexOf(CheckChar) == -1)
   {
    alert ("输入类型必须为英文!");
    return false;
   }
  }
}
  
//校验是否为数字

function checknum(p)
{
if (p == "")
{alert ("输入不能为空!");
  return false;
}
var l = p.length;
var count=0;
for(var i=0; i<l; i++)
{
var digit = p.charAt(i);
if(digit == "." )
{
  ++count;
  if(count>1)
  {alert ("输入类型必须为数字!");
   return false;
  }
  }
else if(digit < "0" || digit > "9")
  {alert ("输入类型必须为数字!");
   return false;
  }
  }
return true;
}
  
//校验IP地址格式
function checkip()
{
var scount=0;
var ip = document.form3.ccc.value;
var iplength = ip.length;
var Letters = "1234567890.";
for (i=0; i < document.form3.ccc.value.length; i++)
  {
   var CheckChar = document.form3.ccc.value.charAt(i);
   if (Letters.indexOf(CheckChar) == -1)
   {
    alert ("IP地址格式不对!!,只能输入数字和“.”,格式为XXX.XXX.XXX.XXX 例如:192.168.0.1");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
    return false;
   }
  }

for (var i = 0;i<iplength;i++)
  (ip.substr(i,1)==".")?scount++:scount;
if(scount!=3)
{
  alert ("IP地址格式不对!,只能输入数字和“.”,格式为XXX.XXX.XXX.XXX 例如:192.168.0.1");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
  return false;
}

first = ip.indexOf(".");
last = ip.lastIndexOf(".");
str1 = ip.substring(0,first);
subip = ip.substring(0,last);
sublength = subip.length;
second = subip.lastIndexOf(".");
str2 = subip.substring(first+1,second);
str3 = subip.substring(second+1,sublength);
str4 = ip.substring(last+1,iplength);

if (str1=="" || str2=="" ||str3== "" ||str4 == "")
{alert("数字不能为空!格式为XXX.XXX.XXX.XXX 例如:192.168.0.1");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
return false;
}
if (str1< 0 || str1 >255)
{alert ("数字范围为0~255!");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
    return false;
}
else if (str2< 0 || str2 >255)
{alert ("数字范围为0~255!");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
return false;
}
else if (str3< 0 || str3 >255)
{alert ("数字范围为0~255!");
    document.form3.ccc.value="";
    document.form3.ccc.focus();
return false;
}
else if (str4< 0 || str4 >255)