(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])
在网上看到用的正则表达式是上面这个，但是用这个表达式的时候如果字符串中出现象xxx.xxx.xxx.xxx.xxx他仍然会进行匹配，并且取的是xxx.xxx.xxx.xxx
怎么样把这个正则表达式改进一下让他不匹配这样的字符串呢？谢谢。。。
新建网页 1
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IP验证2：
IP 地址输入框 v1.0
function outStr(){
if(document.all.ip1.value> 0 && document.all.ip2.value> 0 && document.all.ip3.value> 0 && document.all.ip4.value> 0){
alert( "你输入的IP地址为： " + document.all.ip1.value + ". " + document.all.ip2.value + ". " + document.all.ip3.value + ". " + document.all.ip4.value);
}//end if
}//end
function moveRight(obj){
id = parseInt(obj.name.substr(2,1))
if(id <4){
eval( "document.all.ip " + (id +1) + ".focus() ");
}else{
outStr();
}//end if
}
function moveLeft(obj){
id = parseInt(obj.name.substr(2,1))
if(id> 1){
eval( "document.all.ip " + (id -1) + ".focus() ");
}//end if
}//end if
function Keypress(obj){
var objInput = obj;
cod = window.event.keyCode;
if(cod==46 && (obj.value).length> 0){//如果按了“.”并且有了一个字符，向右移动一次
window.event.keyCode=0;
moveRight(obj);
}else if((obj.value).length==2 && (cod > = 48) && (cod <= 57)){//如果数字键并且够了两位
if(cod <58){//
obj.value = obj.value * 10 + cod - 48;
}//end if
window.event.keyCode = 0;
moveRight(obj);
}else{ //判断输入的是不是数字
if ( !(((cod > = 48) && (cod <= 57)) || (cod == 13) || (cod == 37) || (cod == 39))){
window.event.keyCode = 0;
}//end if
}//end if
}//end function keydown
function getCaretPos(obj){
var currentRange=document.selection.createRange();
var workRange=currentRange.duplicate();
obj.select();
var allRange=document.selection.createRange();
var len=0;
while(workRange.compareEndPoints( "StartToStart ",allRange)> 0){
workRange.moveStart( "character ",-1);
len++;
}
currentRange.select();
return len;
}//end
function KeyDown(obj){
cod = window.event.keyCode;
i = getCaretPos(obj); //光标位置
n = obj.value.length; //字符长度
if(cod==37 && i==0){//光标左移
moveLeft(obj);
}else if(cod==39 && i> =n){
moveRight(obj);
}else if(cod==8 && (obj.value== " " || i==0)){
moveLeft(obj);
}//end if
}//end
function checkDate(obj,max_num){
if(obj.value> max_num || obj.value <0){
window.event.keyCode = 0;
alert(obj.value + "是无效的项目，只能输入0到 " + max_num + "之间的数。 ");
obj.value = max_num;
obj.focus();
obj.select();
}//end if
}//end
BODY {
BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; BORDER-BOTTOM: 0px; BACKGROUND-COLOR: #d6d3ce
}
style= "BORDER-RIGHT: menu 1px solid; BORDER-TOP: menu 1px solid; MARGIN: 10px; BORDER-LEFT: menu 1px solid; BORDER-BOTTOM: menu 1px solid "
bgColor=menu scroll=no>
border=0>
cellPadding=0 border=0>
onkeydown=KeyDown(this) onblur=checkDate(this,223);
style= "BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; WIDTH: 22px; BORDER-BOTTOM: 0px; HEIGHT: 12px "
maxLength=3 name=ip1>
.
onkeydown=KeyDown(this) onblur=checkDate(this,255);
style= "BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; WIDTH: 22px; BORDER-BOTTOM: 0px; HEIGHT: 12px "
maxLength=3 size=3 name=ip2>
.
onkeydown=KeyDown(this) onblur=checkDate(this,255);
style= "BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; WIDTH: 22px; BORDER-BOTTOM: 0px; HEIGHT: 12px "
maxLength=3 size=3 name=ip3>
.
onkeydown=KeyDown(this) onblur=checkDate(this,255);outStr();
style= "BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; WIDTH: 22px; BORDER-BOTTOM: 0px; HEIGHT: 12px "
maxLength=3 size=3 name=ip4>
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IP验证：
IP地址输入
IP地址输入
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