从阿里妈妈发现的几个不错的表单验证函数_表单特效

//--------
// 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> <BR>function encodeHtmlForText(text){ <BR> text = text.replace(new RegExp("&","gm"),"&"); <BR> text = text.replace(new RegExp("<","gm"),"<"); <BR> text = text.replace(new RegExp(">","gm"),">"); <BR> text = text.replace(new RegExp("\'","gm"),"&#39;"); <BR> text = text.replace(new RegExp("\"","gm"),"""); <BR> return text; <BR>} <BR>function encodeHtmlForURL(url){ <BR> url = url.replace(new RegExp("<","gm"),"<"); <BR> url = url.replace(new RegExp(">","gm"),">"); <BR> url = url.replace(new RegExp("\'","gm"),"&#39;"); <BR> url = url.replace(new RegExp("\"","gm"),"""); <BR> return url; <BR>} <BR>function title_url_change(oipt) { <BR> if(oipt){ <BR> var cnt = oipt.value.length; <BR> if(cnt<17){ <BR> $i("cntTitle").style.color="blue"; <BR> $i("cntTitle").innerHTML="(您已输入"+cnt+"字)"; <BR> }else{ <BR> $i("cntTitle").style.color="red"; <BR> $i("cntTitle").innerHTML="(文本超长！您已输入"+cnt+"字)"; <BR> } <BR> } <BR> var title = $i('_fmm.t._0.ti').value; <BR> var clickurl = $i('_fmm.t._0.cl').value; <BR> title = encodeHtmlForText(title); <BR> clickurl = encodeHtmlForURL(clickurl); <BR> $i('adTitle').innerHTML = '<a href='+clickurl+'>'+title+''; <BR>} <BR>function title_change() { <BR> var title = $i('_fmm.t._0.ti').value; <BR> title = encodeHtmlForText(title); <BR> $i('adTitle').innerHTML = title; <BR>} <BR>function description_change(oipt) { <BR> if(oipt){ <BR> var cnt = oipt.value.length; <BR> if(cnt<33){ <BR> $i("cntDesc").style.color="blue"; <BR> $i("cntDesc").innerHTML="(您已输入"+cnt+"字)"; <BR> }else{ <BR> $i("cntDesc").style.color="red"; <BR> $i("cntDesc").innerHTML="(文本超长！您已输入"+cnt+"字)"; <BR> } <BR> } <BR> var desc = $i('_fmm.t._0.d').value; <BR> desc = encodeHtmlForText(desc); <BR> $i('adDesc').innerHTML = desc; <BR>} <BR>function dispurl_change() { <BR> var dispurl = $i('_fmm.t._0.di').value; <BR> dispurl = encodeHtmlForURL(dispurl); <BR> $i('adDispUrl').innerHTML = dispurl; <BR>} <BR>function linkurl_change() { <BR> var clickurl = $i('_fmm.t._0.cl').value; <BR> clickurl = encodeHtmlForURL(clickurl); <BR> $i('adClickUrl').innerHTML = clickurl; <BR>} <BR>function check_count($str){ <BR>if (!$str) return 0; <BR>var $c=0; <BR>for (var $i=0;$i<$str.length;$i++){ <BR> if ($str.charCodeAt($i) > 255){ <BR> $c++; <BR> $c++; <BR> }else <BR> $c++; <BR>} <BR>return $c; <BR>} <BR>function validation() { <BR> $i('_fmm.t._0.n').value = jsTrim($i('_fmm.t._0.n').value); <BR> $i('_fmm.t._0.ti').value = jsTrim($i('_fmm.t._0.ti').value); <BR> $i('_fmm.t._0.d').value = jsTrim($i('_fmm.t._0.d').value); <BR> $i('_fmm.t._0.di').value = jsTrim($i('_fmm.t._0.di').value); <BR> $i('_fmm.t._0.cl').value = jsTrim($i('_fmm.t._0.cl').value); <br><br> var adName = $i('_fmm.t._0.n').value; <BR> var adtitle = $i('_fmm.t._0.ti').value; <BR> var addescription = $i('_fmm.t._0.d').value; <BR> var addispurl = $i('_fmm.t._0.di').value; <BR> var adclickurl = $i('_fmm.t._0.cl').value; <BR> var msg=""; <br><br> $i('_fmm.t._0.t').value = jsTrim($i('_fmm.t._0.t').value); <br><br> var tags = $i('_fmm.t._0.t').value; <br><br> if(!isValidReg(tags)){ <BR> msg=msg+"关键词包含非法字符！\n"; <BR> } <BR> if(!isValidLength(tags,32)){ <BR> msg=msg+"您输入的关键词长度超过限制！\n" <BR> } <br><br> if(isNULL(adName)){ <BR> msg=msg+"请输入广告名称！\n"; <BR> } <BR> if(!isValidReg(adName)){ <BR> msg=msg+"广告名称包含非法字符！ "; <BR> } <BR> if(!isValidLength(adName,16)){ <BR> msg=msg+"输入广告名称长度超过限制！ " <BR> } <BR> if(isNULL(adtitle)){ <BR> msg=msg+"请输入标题内容！\n"; <BR> } <BR> if(!isValidLength(adtitle,16)){ <BR> msg=msg+"输入标题长度超过限制！ "; <BR> } <BR> if(!isValidReg(adtitle)){ <BR> msg=msg+"标题内容包含非法字符！ "; <BR> } <BR> if(isNULL(addescription)){ <BR> msg=msg+"请输入描述内容！\n"; <BR> } <BR> if(!isValidLength(addescription,32)){ <BR> msg=msg+"输入描述长度超过限制！ "; <BR> } <BR> if(!isValidReg(addescription)){ <BR> msg=msg+"描述内容包含非法字符！ "; <BR> } <BR> if(isNULL(addispurl)){ <BR> msg=msg+"请输入显示网址内容！ "; <BR> } <BR> if(!isValidLength(addispurl,1024)){ <BR> msg=msg+"输入显示网址长度超过限制！ "; <BR> } <BR> if(!isValidURL(addispurl)){ <BR> msg=msg+"显示网址输入不合法！\n"; <BR> } <BR> if(isNULL(adclickurl)){ <BR> msg=msg+"请输入链接网址内容！ "; <BR> } <BR> if(!isValidLength(adclickurl,512)){ <BR> msg=msg+"输入链接网址长度超过限制！ "; <BR> } <BR> if(!isValidURL(adclickurl)){ <BR> msg=msg+"链接网址输入不合法！\n"; <BR> } <BR> if(getHostName(adclickurl)!=getHostName(addispurl)){ <BR> msg=msg+"显示URL必须与链接URL位于同一域名下 "; <BR> } <BR> if(!isNULL(msg)){ <BR> alert(msg); <BR> return false; <BR> } <BR> return true; <BR>} <br><br>function getHostName(a){ <BR> a = a.toLowerCase(); <BR> var headlength = 0; <BR> if(a.indexOf("http://")==0){ <BR> headlength = 7; <BR> }else if(a.indexOf("https://")==0){ <BR> headlength = 8; <BR> } <BR> a = a.substr(headlength); <BR> if(a.indexOf("/")>-1){ <BR> a = a.substr(0,a.indexOf("/")); <BR> } <BR> return a; <BR>} <br><br>function addConfirm(form) { <BR> var isvalidate = validation(); <BR> if(isvalidate){ <BR> form.submit(); <BR> }else{ <BR> return false; <BR> } <BR>} <BR>function doTest() { <BR> var adclickurl = $i('_fmm.t._0.cl').value; <BR> var msg = ''; <BR> if(isNULL(adclickurl)){ <BR> msg=msg+"请输入链接网址内容！ "; <BR> } <BR> if(!isValidLength(adclickurl,512)){ <BR> msg=msg+"输入链接网址长度超过限制！ "; <BR> } <BR> if(!isValidURL(adclickurl)){ <BR> msg=msg+"链接网址输入不合法！\n"; <BR> } <BR> if(!isNULL(msg)){ <BR> alert(msg); <BR> return false; <BR> } <BR> popup = window.open(adclickurl, 'popupnav', <BR>'width=400,height=300,left=480,top=250,resizable=1,scrollbars=yes'); <BR> return false; <BR>} <BR>function doInit() { <BR> var dispURL = $i('_fmm.t._0.di'); <BR> var clickURL = $i('_fmm.t._0.cl'); <BR> if(clickURL.value == '') { <BR> clickURL.value = 'http://'; <BR> } <BR> if(dispURL.value == '') { <BR> dispURL.value = 'http://'; <BR> } <BR>} <BR>doInit(); <BR></script>