从阿里妈妈发现的几个不错的表单验证函数

//--------
//保存当前Form表单（仅适用于IE浏览器）
//--------
functionformSaveCheck(fileName){
if(isNetscape()){alert("Sorry,thesefunctionisnotsupported")}
elsedocument.execCommand('SaveAs',null,fileName)
}

//--------
//校验数据的合法性
//--------
functionisValidReg(chars){
varre=/<|>|[|]|{|}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|
ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ
|■|▄|▆|*|@|#|^|/;
if(re.test(chars)==true){
returnfalse;
}else{
returntrue;
}
}

//--------
//检查数据的长度是否合法
//--------
functionisValidLength(chars,len){
if(chars.length>len){
returnfalse;
}
returntrue;
}

//--------
//校验URL的合法性
//--------
functionisValidURL(chars){
//varre=/^([hH][tT]{2}[pP]://|[hH][tT]{2}[pP][sS]://)((((w+(-*w*)+).)+((com)|
(net)|(edu)|(gov)|(org)|(biz)|(aero)|(coop)|(info)|(name)|(pro)|(museum))(.([a-z]{2}))?)|((w+(-
*w*)+).(cn)))$/;
varre=/^([hH][tT]{2}[pP]://|[hH][tT]{2}[pP][sS]://)(S+.S+)$/;
//varre=/^([hH][tT]{2}[pP]://|[hH][tT]{2}[pP][sS]://)(((((w+(-*w*)+).)+((com)|
(net)|(edu)|(gov)|(org)|(biz)|(aero)|(coop)|(info)|(name)|(pro)|(museum)|(cn)|(tv)|(hk))(.([a-z]
{2}))?)|((w+(-*w*)+).(cn)))((/|?)S*)*)$/;
if(!isNULL(chars)){
chars=jsTrim(chars);
if(chars.match(re)==null)
returnfalse;
else
returntrue;
}
returnfalse;
}

//--------
//校验数字的合法性
//--------
functionisValidDecimal(chars){
varre=/^d*.?d{1,2}$/;
if(chars.match(re)==null)
returnfalse;
else
returntrue;
}

//--------
//校验数字的合法性
//--------
functionisNumber(chars){
varre=/^d*$/;
if(chars.match(re)==null)
returnfalse;
else
returntrue;
}

//--------
//校验邮编的合法性
//--------
functionisValidPost(chars){
varre=/^d{6}$/;
if(chars.match(re)==null)
returnfalse;
else
returntrue;
}

//--------
//去掉数据的首尾空字符
//--------
functionjsTrim(value){
returnvalue.replace(/(^s*)|(s*$)/g,"");
}

//--------
//校验数据是否为空（当数据为空字符时也为NULL）
//--------
functionisNULL(chars){
if(chars==null)
returntrue;
if(jsTrim(chars).length==0)
returntrue;
returnfalse;
}

//--------
//校验Email的合法性
//--------
functioncheckEmail(fieldName,bMsg)
{
varemailStr=fieldName.value;

varemailPat=/^(.+)@(.+)$/
varspecialChars="()<>@,;:".[]"
varvalidChars="[^s"+specialChars+"]"
varquotedUser="("[^"]*")"
varipDomainPat=/^[(d{1,3}).(d{1,3}).(d{1,3}).(d{1,3})]$/
varatom=validChars+'+'
varword="("+atom+"|"+quotedUser+")"
varuserPat=newRegExp("^"+word+"(."+word+")*$")
vardomainPat=newRegExp("^"+atom+"(."+atom+")*$")

varmatchArray=emailStr.match(emailPat)
if(matchArray==null)
{
if(bMsg)alert("Emailaddressseemsincorrect(check@and.'s)")
returnfalse
}
varuser=matchArray[1]
vardomain=matchArray[2]

//Seeif"user"isvalid
if(user.match(userPat)==null)
{
if(bMsg)alert("TheEmailaddressseemsincorrect.")
//fieldName.focus();
returnfalse
}

/*ifthee-mailaddressisatanIPaddress(asopposedtoasymbolic
hostname)makesuretheIPaddressisvalid.*/
varIPArray=domain.match(ipDomainPat)
if(IPArray!=null)
{
for(vari=1;i<=4;i++)
{
if(IPArray[i]>255)
{
if(bMsg)alert("DestinationIPaddressisinvalid!")
returnfalse
}
}
returntrue
}

//Domainissymbolicname
vardomainArray=domain.match(domainPat)
if(domainArray==null)
{
if(bMsg)alert("Thedomainnamedoesn'tseemtobevalid.")
returnfalse
}

/*domainnameseemsvalid,butnowmakesurethatitendsina
three-letterword(likecom,edu,gov)oratwo-letterword,
representingcountry(uk,nl),andthatthere'sahostnamepreceding
thedomainorcountry.*/

varatomPat=newRegExp(atom,"g")
vardomArr=domain.match(atomPat)
varlen=domArr.length
if(domArr[domArr.length-1].length<2||domArr[domArr.length-1].length>3)
{
//theaddressmustendinatwoletterorthreeletterword.
if(bMsg)alert("Theaddressmustendinathree-letterdomain,ortwolettercountry.")
returnfalse
}

//Makesurethere'sahostnameprecedingthedomain.
if(len<2)
{
if(bMsg)alert("Thisaddressismissingahostname!")
returnfalse
}

//Ifwe'vegotthisfar,everything'svalid!
returntrue;
}

//--------
//判断是否为闰年
//--------
functionisLeapYear(year){
if(year%4!=0)
returnfalse;
if(year%400==0)
returntrue;
if(year%100==0)
returnfalse;
returntrue;
}

//--------
//校验日期的合法性
//--------
functionvalidateDate(day,month,year)
{
if((day<=0)||(month<=0)||(year<=0))
returnfalse;

if((month>=1)&&(month<=12)){
if(month==2){
if(isLeapYear(year)){
if(day<=29)
returntrue;
}else{
if(day<=28)
returntrue;
else
returnfalse;
}
}elseif((month==4)||(month==6)||(month==9)||(month==11)){
if(day<=30)
returntrue;
else
returnfalse;
}else{
if(day<=31)
returntrue;
else
returnfalse;
}
}

returnfalse;
}

//--------
//判断数据是否包含都是SingleByte
//--------
functionisSingleByteString(str)
{
varrc=true;
varj=0,i=0;
for(i=0;ij=str.charCodeAt(i);
if(j>=128){
rc=false;
break;
}
}
returnrc;
}

varsubmitEvent=true;
functioncheckDoubleSubmit(){
returnsubmitEvent;
}

//--------
//弹出窗口
//参数：url-弹出窗口显示URL的内容
//w-弹出窗口的宽度
//h-弹出窗口的高度
//isCenter-控制弹出窗口是否在屏幕中央显示，值为true/false
//isResizable-控制弹出窗口是否可以改变大小，值为true/false
//isScroll-控制弹出窗口是否有滚动条，值为true/false
//--------
functionpopupWindow(url,w,h,isCenter,isResizable,isScroll){
if(isNULL(url))return;
varscrLeft=0;
varscrTop=0;
varscroll="no";
varresize="no";
if(isCenter){
scrLeft=(screen.width-w)/2;
scrTop=(screen.height-h)/2;
}
if(isResizable)resize="yes";
if(isScroll)scroll="yes";
window.open(url,'popupWindow',
'height='+h+',width='+w+',top='+scrTop+',left='+scrLeft+',toolbar=no,menubar=no,scrollbars='+scrol
l+',resizable='+resize+',location=no,status=no');
}

//--------
//弹出窗口
//参数：url-弹出窗口显示URL的内容
//w-弹出窗口的宽度
//h-弹出窗口的高度
//isCenter-控制弹出窗口是否在屏幕中央显示，值为true/false
//isResizable-控制弹出窗口是否可以改变大小，值为true/false
//isModal-控制弹出窗口是否为模式或非模式对话框，值为ture/false
//--------
functionpopupModalWindow(url,w,h,isCenter,isResizable,isModal){
if(isNULL(url))return;
varscrLeft=0;
varscrTop=0;
varresize="no";
varcnt="no";
if(isCenter){
cnt="yes";
scrLeft=(screen.width-w)/2;
scrTop=(screen.height-h)/2;
}
if(isResizable)resize="yes";
if(isModal)
window.showModalDialog(url,'popupWindow',
'dialogWidth:'+w+'px;dialogHeight:'+h+'px;dialogLeft:'+scrLeft+'px;dialogTop:'+scrTop+'px;center:'
+cnt+';help:no;resizable:'+resize+';status:no');
else
window.showModelessDialog(url,'popupWindow',
'dialogWidth:'+w+'px;dialogHeight:'+h+'px;dialogLeft:'+scrLeft+'px;dialogTop:'+scrTop+'px;center:'
+cnt+';help:no;resizable:'+resize+';status:no');
}

//--------
//弹出窗口
//参数：url-弹出窗口显示URL的内容
//w-弹出窗口的宽度
//h-弹出窗口的高度
//isCenter-控制弹出窗口是否在屏幕中央显示，值为true/false
//isResizable-控制弹出窗口是否可以改变大小，值为true/false
//isScroll-控制弹出窗口是否有滚动条，值为true/false
//--------
functionopenWindowCenter(urll,w,h){
vartop=(window.screen.height-h)/2;
varleft=(window.screen.width-w)/2;
varparam='toolbar=no,menubar=no,scrollbars=yes,resizable=no,location=no,status=no,top=';
param=param+top;
param=param+',left=';
param=param+left;
param=param+',height='+h;
param=param+',width='+w;
varw=window.open(urll,"",param)
if(w!=null&&typeof(w)!="undefined"){
w.focus();
}
}

functionencodeHtmlForText(text){
text=text.replace(newRegExp("&","gm"),"&");
text=text.replace(newRegExp("<","gm"),"<");
text=text.replace(newRegExp(">","gm"),">");
text=text.replace(newRegExp("'","gm"),"'");
text=text.replace(newRegExp(""","gm"),""");
returntext;
}
functionencodeHtmlForURL(url){
url=url.replace(newRegExp("<","gm"),"<");
url=url.replace(newRegExp(">","gm"),">");
url=url.replace(newRegExp("'","gm"),"'");
url=url.replace(newRegExp(""","gm"),""");
returnurl;
}
functiontitle_url_change(oipt){
if(oipt){
varcnt=oipt.value.length;
if(cnt<17){
$i("cntTitle").style.color="blue";
$i("cntTitle").innerHTML="(您已输入"+cnt+"字)";
}else{
$i("cntTitle").style.color="red";
$i("cntTitle").innerHTML="(文本超长！您已输入"+cnt+"字)";
}
}
vartitle=$i('_fmm.t._0.ti').value;
varclickurl=$i('_fmm.t._0.cl').value;
title=encodeHtmlForText(title);
clickurl=encodeHtmlForURL(clickurl);
$i('adTitle').innerHTML=''+title+'';
}
functiontitle_change(){
vartitle=$i('_fmm.t._0.ti').value;
title=encodeHtmlForText(title);
$i('adTitle').innerHTML=title;
}
functiondescription_change(oipt){
if(oipt){
varcnt=oipt.value.length;
if(cnt<33){
$i("cntDesc").style.color="blue";
$i("cntDesc").innerHTML="(您已输入"+cnt+"字)";
}else{
$i("cntDesc").style.color="red";
$i("cntDesc").innerHTML="(文本超长！您已输入"+cnt+"字)";
}
}
vardesc=$i('_fmm.t._0.d').value;
desc=encodeHtmlForText(desc);
$i('adDesc').innerHTML=desc;
}
functiondispurl_change(){
vardispurl=$i('_fmm.t._0.di').value;
dispurl=encodeHtmlForURL(dispurl);
$i('adDispUrl').innerHTML=dispurl;
}
functionlinkurl_change(){
varclickurl=$i('_fmm.t._0.cl').value;
clickurl=encodeHtmlForURL(clickurl);
$i('adClickUrl').innerHTML=clickurl;
}
functioncheck_count($str){
if(!$str)return0;
var$c=0;
for(var$i=0;$i<$str.length;$i++){
if($str.charCodeAt($i)>255){
$c++;
$c++;
}else
$c++;
}
return$c;
}
functionvalidation(){
$i('_fmm.t._0.n').value=jsTrim($i('_fmm.t._0.n').value);
$i('_fmm.t._0.ti').value=jsTrim($i('_fmm.t._0.ti').value);
$i('_fmm.t._0.d').value=jsTrim($i('_fmm.t._0.d').value);
$i('_fmm.t._0.di').value=jsTrim($i('_fmm.t._0.di').value);
$i('_fmm.t._0.cl').value=jsTrim($i('_fmm.t._0.cl').value);

varadName=$i('_fmm.t._0.n').value;
varadtitle=$i('_fmm.t._0.ti').value;
varaddescription=$i('_fmm.t._0.d').value;
varaddispurl=$i('_fmm.t._0.di').value;
varadclickurl=$i('_fmm.t._0.cl').value;
varmsg="";

$i('_fmm.t._0.t').value=jsTrim($i('_fmm.t._0.t').value);

vartags=$i('_fmm.t._0.t').value;

if(!isValidReg(tags)){
msg=msg+"关键词包含非法字符！n";
}
if(!isValidLength(tags,32)){
msg=msg+"您输入的关键词长度超过限制！n"
}

if(isNULL(adName)){
msg=msg+"请输入广告名称！n";
}
if(!isValidReg(adName)){
msg=msg+"广告名称包含非法字符！n";
}
if(!isValidLength(adName,16)){
msg=msg+"输入广告名称长度超过限制！n"
}
if(isNULL(adtitle)){
msg=msg+"请输入标题内容！n";
}
if(!isValidLength(adtitle,16)){
msg=msg+"输入标题长度超过限制！n";
}
if(!isValidReg(adtitle)){
msg=msg+"标题内容包含非法字符！n";
}
if(isNULL(addescription)){
msg=msg+"请输入描述内容！n";
}
if(!isValidLength(addescription,32)){
msg=msg+"输入描述长度超过限制！n";
}
if(!isValidReg(addescription)){
msg=msg+"描述内容包含非法字符！n";
}
if(isNULL(addispurl)){
msg=msg+"请输入显示网址内容！n";
}
if(!isValidLength(addispurl,1024)){
msg=msg+"输入显示网址长度超过限制！n";
}
if(!isValidURL(addispurl)){
msg=msg+"显示网址输入不合法！n";
}
if(isNULL(adclickurl)){
msg=msg+"请输入链接网址内容！n";
}
if(!isValidLength(adclickurl,512)){
msg=msg+"输入链接网址长度超过限制！n";
}
if(!isValidURL(adclickurl)){
msg=msg+"链接网址输入不合法！n";
}
if(getHostName(adclickurl)!=getHostName(addispurl)){
msg=msg+"显示URL必须与链接URL位于同一域名下n";
}
if(!isNULL(msg)){
alert(msg);
returnfalse;
}
returntrue;
}

functiongetHostName(a){
a=a.toLowerCase();
varheadlength=0;
if(a.indexOf("http://")==0){
headlength=7;
}elseif(a.indexOf("https://")==0){
headlength=8;
}
a=a.substr(headlength);
if(a.indexOf("/")>-1){
a=a.substr(0,a.indexOf("/"));
}
returna;
}

functionaddConfirm(form){
varisvalidate=validation();
if(isvalidate){
form.submit();
}else{
returnfalse;
}
}
functiondoTest(){
varadclickurl=$i('_fmm.t._0.cl').value;
varmsg='';
if(isNULL(adclickurl)){
msg=msg+"请输入链接网址内容！n";
}
if(!isValidLength(adclickurl,512)){
msg=msg+"输入链接网址长度超过限制！n";
}
if(!isValidURL(adclickurl)){
msg=msg+"链接网址输入不合法！n";
}
if(!isNULL(msg)){
alert(msg);
returnfalse;
}
popup=window.open(adclickurl,'popupnav',
'width=400,height=300,left=480,top=250,resizable=1,scrollbars=yes');
returnfalse;
}
functiondoInit(){
vardispURL=$i('_fmm.t._0.di');
varclickURL=$i('_fmm.t._0.cl');
if(clickURL.value==''){
clickURL.value='http://';
}
if(dispURL.value==''){
dispURL.value='http://';
}
}
doInit();