<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html><head>
<title>测试</title>
<meta http-equiv="Content-type" content="text/html; charset=gb2312">
<meta http-equiv="pragma" content="no-cache">
<style type="text/css"><!--
.textiploghidden {
BORDER-RIGHT: 2px; BORDER-TOP: 2px; FONT-SIZE: 12px; BORDER-LEFT: 2px; WIDTH: 30px; COLOR: #ffffff; BORDER-BOTTOM: 2px; FONT-FAMILY: sans-serif; HEIGHT: 22px; border: 1 solid #000000
}
.textipinput {
BORDER-RIGHT: 0px; BORDER-TOP: 0px; FONT-SIZE: 11px; BORDER-LEFT: 0px; WIDTH: 30px; COLOR: #000000; BORDER-BOTTOM: 0px; FONT-FAMILY: sans-serif; HEIGHT: 19px; BACKGROUND-COLOR: #ffffff; TEXT-ALIGN: center
}
--></style>
<SCRIPT language=JavaScript1.2> function checkIPValid_1()
{
if(event.shiftKey)
{
event.returnValue=false;
return;
}
var keyCode = parseInt(event.keyCode);
var result=true;
if((keyCode==8) || (keyCode==37) || (keyCode==39) || (keyCode==9)) return; if((keyCode>=48) && (keyCode<=57)) return;
else result=false;
if((keyCode>=96) && (keyCode<=105)) return;
else result=false; if((keyCode==110) || (keyCode==190) || (keyCode==32))
{
event.keyCode=9;
return;
}
if(result==false) event.returnValue=false;
} function checkIPValid_2(formname,ip)
{
var form = eval("document."+formname)
var ip_1 = parseInt(eval("form."+ip+".value"));
if(ip_1>223)
{
eval("form."+ip).value="223";
alert(ip_1+"不是个有效项目,请指定一个介于1和223之间的数值"); }
else if(ip_1==127)
{
eval("form."+ip).value="1";
alert("以127开头的IP地址无效,因为它们保留用作环回地址,请在1和223之间指定一些其他有效值");
}
} function checkIPValid_3(mask)
{
if(typeof(mask) != 'object'){
mask = eval(mask)
}
var maskInt=parseInt(mask.value);
if((maskInt<0) || (maskInt>255))
{
mask.value=255;
alert(maskInt+"不是个有效项目,请指定一个介于0和255之间的数值");
}
} function checkIPValid_4(mask)
{
var maskInt=parseInt(mask.value);
if((maskInt<0) || (maskInt>32))
{
mask.value="";
alert("掩码错误,请指定一个介于0和32之间的数值");
}
}
function checkIPValid_5()
{
var keyCode = parseInt(event.keyCode);
var result=true;
if((keyCode==219) || (keyCode==221) || (keyCode==191) || (keyCode==220) || (keyCode==186) || (keyCode==32))
{
result=false;
}
if(result==false) event.returnValue=false;
}
</SCRIPT>
</head> <body>
<form name=form1>
<table width="100%" border="0" cellpadding="4" cellspacing="2">
<tr>
<td colspan="2" align="right" style="padding-right:267;" ><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="80" align="right" style="padding-right:3px;">IP地址:</td>
<td width="200" align="left" valign="bottom" ><table border="0" cellpadding="0" cellspacing="0" class="textiploghidden" style="width:140px">
<tr>
<td width="50" align="center" valign="bottom"><input name="ip1" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_2('form1','ip1')"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip2" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip2'))"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip3" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip3'))"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip4" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip4'))"/></td>
</tr>
</table></td>
</tr>
</table></td>
</tr>
</table>
</form>
</body>
</html>
<html><head>
<title>测试</title>
<meta http-equiv="Content-type" content="text/html; charset=gb2312">
<meta http-equiv="pragma" content="no-cache">
<style type="text/css"><!--
.textiploghidden {
BORDER-RIGHT: 2px; BORDER-TOP: 2px; FONT-SIZE: 12px; BORDER-LEFT: 2px; WIDTH: 30px; COLOR: #ffffff; BORDER-BOTTOM: 2px; FONT-FAMILY: sans-serif; HEIGHT: 22px; border: 1 solid #000000
}
.textipinput {
BORDER-RIGHT: 0px; BORDER-TOP: 0px; FONT-SIZE: 11px; BORDER-LEFT: 0px; WIDTH: 30px; COLOR: #000000; BORDER-BOTTOM: 0px; FONT-FAMILY: sans-serif; HEIGHT: 19px; BACKGROUND-COLOR: #ffffff; TEXT-ALIGN: center
}
--></style>
<SCRIPT language=JavaScript1.2> function checkIPValid_1()
{
if(event.shiftKey)
{
event.returnValue=false;
return;
}
var keyCode = parseInt(event.keyCode);
var result=true;
if((keyCode==8) || (keyCode==37) || (keyCode==39) || (keyCode==9)) return; if((keyCode>=48) && (keyCode<=57)) return;
else result=false;
if((keyCode>=96) && (keyCode<=105)) return;
else result=false; if((keyCode==110) || (keyCode==190) || (keyCode==32))
{
event.keyCode=9;
return;
}
if(result==false) event.returnValue=false;
} function checkIPValid_2(formname,ip)
{
var form = eval("document."+formname)
var ip_1 = parseInt(eval("form."+ip+".value"));
if(ip_1>223)
{
eval("form."+ip).value="223";
alert(ip_1+"不是个有效项目,请指定一个介于1和223之间的数值"); }
else if(ip_1==127)
{
eval("form."+ip).value="1";
alert("以127开头的IP地址无效,因为它们保留用作环回地址,请在1和223之间指定一些其他有效值");
}
} function checkIPValid_3(mask)
{
if(typeof(mask) != 'object'){
mask = eval(mask)
}
var maskInt=parseInt(mask.value);
if((maskInt<0) || (maskInt>255))
{
mask.value=255;
alert(maskInt+"不是个有效项目,请指定一个介于0和255之间的数值");
}
} function checkIPValid_4(mask)
{
var maskInt=parseInt(mask.value);
if((maskInt<0) || (maskInt>32))
{
mask.value="";
alert("掩码错误,请指定一个介于0和32之间的数值");
}
}
function checkIPValid_5()
{
var keyCode = parseInt(event.keyCode);
var result=true;
if((keyCode==219) || (keyCode==221) || (keyCode==191) || (keyCode==220) || (keyCode==186) || (keyCode==32))
{
result=false;
}
if(result==false) event.returnValue=false;
}
</SCRIPT>
</head> <body>
<form name=form1>
<table width="100%" border="0" cellpadding="4" cellspacing="2">
<tr>
<td colspan="2" align="right" style="padding-right:267;" ><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="80" align="right" style="padding-right:3px;">IP地址:</td>
<td width="200" align="left" valign="bottom" ><table border="0" cellpadding="0" cellspacing="0" class="textiploghidden" style="width:140px">
<tr>
<td width="50" align="center" valign="bottom"><input name="ip1" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_2('form1','ip1')"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip2" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip2'))"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip3" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip3'))"/></td>
<td align="center" width="4" style="font-weight:bold;color=#000000">.</td>
<td width="50" align="center" valign="bottom"><input name="ip4" maxlength="3" class="textipinput" value="" onKeyDown="checkIPValid_1()" onKeyUp="checkIPValid_3(eval('document.form1.ip4'))"/></td>
</tr>
</table></td>
</tr>
</table></td>
</tr>
</table>
</form>
</body>
</html>
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以下两个js文件可以到网上搜索下载:
jquery-1.2.6.js
jquery.maskedinput-1.2.1.js<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title> <script src="src/jquery-1.2.6.js" type="text/javascript"></script> <script src="src/Plusins/jquery.maskedinput-1.2.1.js" type="text/javascript"></script></head>
<body>
<input id="txtIP" type="text" />
</body>
</html><script type="text/javascript">
$(function() {
$('#txtIP').mask('999.999.999.999');
})
</script>