从阿里妈妈发现的几个不错的表单验证函数

//--------
// 检查当前浏览器是否为Netscape
//--------
function isNetscape(){
 app=navigator.appName.substring(0,1);
 if (app=='N') return true;
 else {return false;}
}

//--------
// 保存当前Form表单（仅适用于IE浏览器）
//--------
function formSaveCheck(fileName){
 if(isNetscape()){alert("Sorry, these function is not supported")}
 else document.execCommand('SaveAs',null,fileName)
}

//--------
// 校验数据的合法性
//--------
function isValidReg( chars){
 var re=/|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|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) {
 return false;
 }else{
 return true;
 }
}

//--------
// 检查数据的长度是否合法
//--------
function isValidLength(chars, len) {
 if (chars.length > len) {
 return false;
 }
 return true;
}

//--------
// 校验URL的合法性
//--------
function isValidURL( chars ) {
 //var re=/^([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)))$/;
 var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;
 //var re=/^([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)
 return false;
 else
 return true;
 }
 return false;
}

//--------
// 校验数字的合法性
//--------
function isValidDecimal( chars ) {
 var re=/^\d*\.?\d{1,2}$/;
 if (chars.match(re) == null)
 return false;
 else
 return true;
}

//--------
// 校验数字的合法性
//--------
function isNumber( chars ) {
 var re=/^\d*$/;
 if (chars.match(re) == null)
 return false;
 else
 return true;
}

//--------
// 校验邮编的合法性
//--------
function isValidPost( chars ) {
 var re=/^\d{6}$/;
 if (chars.match(re) == null)
 return false;
 else
 return true;
}

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

//--------
// 校验数据是否为空（当数据为空字符时也为NULL）
//--------
function isNULL( chars ) {
 if (chars == null)
 return true;
 if (jsTrim(chars).length==0)
 return true;
 return false;
}

//--------
// 校验Email的合法性
//--------
function checkEmail (fieldName, bMsg)
{
 var emailStr = fieldName.value;

 var emailPat=/^(.+)@(.+)$/
 var specialChars="\$\$@,;:\\\\\\\"\\.\\[\\]"
 var validChars="\[^\\s" + specialChars + "\]"
 var quotedUser="(\"[^\"]*\")"
 var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
 var atom=validChars + '+'
 var word="(" + atom + "|" + quotedUser + ")"
 var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
 var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")

 var matchArray=emailStr.match(emailPat)
 if (matchArray==null)
 {
 if (bMsg) alert("Email address seems incorrect (check @ and .'s)")
 return false
 }
 var user=matchArray[1]
 var domain=matchArray[2]

 // See if "user" is valid
 if (user.match(userPat)==null)
 {
 if (bMsg) alert("The Email address seems incorrect.")
 // fieldName.focus();
 return false
 }

 /* if the e-mail address is at an IP address (as opposed to a symbolic
 host name) make sure the IP address is valid. */
 var IPArray=domain.match(ipDomainPat)
 if (IPArray!=null)
 {
 for (var i=1;i {
 if (IPArray[i]>255)
 {
 if (bMsg) alert("Destination IP address is invalid!")
 return false
 }
 }
 return true
 }

 // Domain is symbolic name
 var domainArray=domain.match(domainPat)
 if (domainArray==null)
 {
 if (bMsg) alert("The domain name doesn't seem to be valid.")
 return false
 }

 /* domain name seems valid, but now make sure that it ends in a
 three-letter word (like com, edu, gov) or a two-letter word,
 representing country (uk, nl), and that there's a hostname preceding
 the domain or country. */

 var atomPat=new RegExp(atom,"g")
 var domArr=domain.match(atomPat)
 var len=domArr.length
 if (domArr[domArr.length-1].length3)
 {
 // the address must end in a two letter or three letter word.
 if (bMsg) alert("The address must end in a three-letter domain, or two letter country.")
 return false
 }

 // Make sure there's a host name preceding the domain.
 if (len {
 if (bMsg) alert("This address is missing a hostname!")
 return false
 }

 // If we've got this far, everything's valid!
 return true;
}

//--------
// 判断是否为闰年
//--------
function isLeapYear(year){
 if (year % 4 != 0)
 return false;
 if (year % 400 == 0)
 return true;
 if (year % 100 == 0)
 return false;
 return true;
}

//--------
// 校验日期的合法性
//--------
function validateDate(day,month,year)
{
 if ((day return false;

 if ((month>=1)&&(month if (month == 2) {
 if (isLeapYear(year)) {
 if (day return true;
 } else {
 if (day return true;
 else
 return false;
 }
 } else if ((month==4)||(month==6)||(month==9)||(month==11)) {
 if (day return true;
 else
 return false;
 } else {
 if (day return true;
 else
 return false;
 }
 }

 return false;
}

//--------
// 判断数据是否包含都是Single Byte
//--------
function isSingleByteString(str)
{
 var rc = true;
 var j = 0, i = 0;
 for (i=0; i j = str.charCodeAt(i);
 if (j>=128) {
 rc = false;
 break;
 }
 }
 return rc;
}

var submitEvent = true;
function checkDoubleSubmit(){
 return submitEvent;
}

//--------
// 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
//--------
function popupWindow(url,w,h,isCenter,isResizable,isScroll) {
 if (isNULL(url)) return;
 var scrLeft = 0;
 var scrTop = 0;
 var scroll = "no";
 var resize = "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
//--------
function popupModalWindow(url,w,h,isCenter,isResizable,isModal) {
 if (isNULL(url)) return;
 var scrLeft = 0;
 var scrTop = 0;
 var resize = "no";
 var cnt = "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
//--------
function openWindowCenter(urll,w,h){
 var top=(window.screen.height-h)/2;
 var left=(window.screen.width-w)/2;
 var param='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;
 var w=window.open (urll,"",param)
 if(w!=null && typeof(w)!="undefined"){
 w.focus();
 }
}

<script> function encodeHtmlForText(text){ text = text.replace(new RegExp("&","gm"),"&"); text = text.replace(new RegExp("<","gm"),"<"); text = text.replace(new RegExp(">","gm"),">"); text = text.replace(new RegExp("\'","gm"),"'"); text = text.replace(new RegExp("\"","gm"),"""); return text; } function encodeHtmlForURL(url){ url = url.replace(new RegExp("<","gm"),"<"); url = url.replace(new RegExp(">","gm"),">"); url = url.replace(new RegExp("\'","gm"),"'"); url = url.replace(new RegExp("\"","gm"),"""); return url; } function title_url_change(oipt) { if(oipt){ var cnt = 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)"; } } var title = $i('_fmm.t._0.ti').value; var clickurl = $i('_fmm.t._0.cl').value; title = encodeHtmlForText(title); clickurl = encodeHtmlForURL(clickurl); $i('adTitle').innerHTML = '<a href='+clickurl+'>'+title+''; } function title_change() { var title = $i('_fmm.t._0.ti').value; title = encodeHtmlForText(title); $i('adTitle').innerHTML = title; } function description_change(oipt) { if(oipt){ var cnt = 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)"; } } var desc = $i('_fmm.t._0.d').value; desc = encodeHtmlForText(desc); $i('adDesc').innerHTML = desc; } function dispurl_change() { var dispurl = $i('_fmm.t._0.di').value; dispurl = encodeHtmlForURL(dispurl); $i('adDispUrl').innerHTML = dispurl; } function linkurl_change() { var clickurl = $i('_fmm.t._0.cl').value; clickurl = encodeHtmlForURL(clickurl); $i('adClickUrl').innerHTML = clickurl; } function check_count($str){ if (!$str) return 0; var $c=0; for (var $i=0;$i<$str.length;$i++){ if ($str.charCodeAt($i) > 255){ $c++; $c++; }else $c++; } return $c; } function validation() { $i('_fmm.t._0.n').value = jsTrim($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); var adName = $i('_fmm.t._0.n').value; var adtitle = $i('_fmm.t._0.ti').value; var addescription = $i('_fmm.t._0.d').value; var addispurl = $i('_fmm.t._0.di').value; var adclickurl = $i('_fmm.t._0.cl').value; var msg=""; $i('_fmm.t._0.t').value = jsTrim($i('_fmm.t._0.t').value); var tags = $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！ "; } if(!isValidLength(adName,16)){ msg=msg+"输入广告名称长度超过限制！ " } 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！ "; } if(!isValidReg(adtitle)){ msg=msg+"标题内容包含非法字符！ "; } 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！ "; } if(!isValidReg(addescription)){ msg=msg+"描述内容包含非法字符！ "; } if(isNULL(addispurl)){ msg=msg+"请输入显示网址内容！ "; } if(!isValidLength(addispurl,1024)){ msg=msg+"输入显示网址长度超过限制！ "; } 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！ "; } if(!isValidLength(adclickurl,512)){ msg=msg+"输入链接网址长度超过限制！ "; } 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 "; } if(!isNULL(msg)){ alert(msg); return false; } return true; } function getHostName(a){ a = a.toLowerCase(); var headlength = 0; if(a.indexOf("http://")==0){ headlength = 7; }else if(a.indexOf("https://")==0){ headlength = 8; } a = a.substr(headlength); if(a.indexOf("/")>-1){ a = a.substr(0,a.indexOf("/")); } return a; } function addConfirm(form) { var isvalidate = validation(); if(isvalidate){ form.submit(); }else{ return false; } } function doTest() { var adclickurl = $i('_fmm.t._0.cl').value; var msg = ''; if(isNULL(adclickurl)){ msg=msg+"请输入链接网址内容！ "; } if(!isValidLength(adclickurl,512)){ msg=msg+"输入链接网址长度超过限制！ "; } if(!isValidURL(adclickurl)){ msg=msg+"链接网址输入不合法！\n"; } if(!isNULL(msg)){ alert(msg); return false; } popup = window.open(adclickurl, 'popupnav', 'width=400,height=300,left=480,top=250,resizable=1,scrollbars=yes'); return false; } function doInit() { var dispURL = $i('_fmm.t._0.di'); var clickURL = $i('_fmm.t._0.cl'); if(clickURL.value == '') { clickURL.value = 'http://'; } if(dispURL.value == '') { dispURL.value = 'http://'; } } doInit(); </script>

从阿里妈妈发现的几个不错的表单验证函数_表单特效