blocks|key|1247259|text|我们还可以使用正则表达式(/%5E(\w.-%2B)@(\w-%2B)((.(\w){2,3})%2B)$/i)验证电子邮件地址格式是否正确。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1247260|var+emailRegex+=+new+RegExp(/%5E([\w\.\-]%2B)@([\w\-]%2B)((\.(\w){2,3})%2B)$/i);
+var+valid+=+emailRegex.test(emailAddress);
++if+(!valid)+{
++++alert("Invalid+e-mail+address");
++++return+false;
++}+else
++++return+true;|code-block|syntax|javascript|1247261|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

We can also use regular expression (/^([\w.-]+)@([\w-]+)((.(\w){2,3})+)$/i) to validate email address format is correct or not.

<pre><code>var emailRegex = new RegExp(/^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$/i);
 var valid = emailRegex.test(emailAddress);
 if (!valid) {
 alert("Invalid e-mail address");
 return false;
 } else
 return true;
</code></pre>

blocks|key|1032185|text|Lolz这个好多了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1032186|++++function+isValidEmailAddress(emailAddress)+{
++++++++var+pattern+=+new+RegExp(/%5E([\w-\.]%2B@([\w-]%2B\.)%2B[\w-]{2,4})?$/);
++++++++return+pattern.test(emailAddress);
++++};|code-block|syntax|javascript|1032187|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Lolz this is much better

<pre><code> function isValidEmailAddress(emailAddress) {
 var pattern = new RegExp(/^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/);
 return pattern.test(emailAddress);
 };
</code></pre>

blocks|key|1032199|text|$(document).ready(function()+{
++$('#emailid').focusout(function(){
++++$('#emailid').filter(function(){
++++++var+email+=+$('#emailid').val();
++++++var+emailReg+=+/%5E([\w-\.]%2B@([\w-]%2B\.)%2B[\w-]{2,4})?$/;
++++++if+(+!emailReg.test(+email+)+)+{
++++++++alert('Please+enter+valid+email');
++++++}+else+{
++++++++alert('Thank+you+for+your+valid+email');
++++++}
++++});
++});+++++++++++++++++
});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1032200|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre class="lang-js prettyprint-override"><code>$(document).ready(function() {
 $('#emailid').focusout(function(){
 $('#emailid').filter(function(){
 var email = $('#emailid').val();
 var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
 if ( !emailReg.test( email ) ) {
 alert('Please enter valid email');
 } else {
 alert('Thank you for your valid email');
 }
 });
 }); 
});
</code></pre>

blocks|key|1032270|text|Javascript：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1032271|var+pattern+=+new+RegExp("%5E[_A-Za-z0-9-]%2B(\\.[_A-Za-z0-9-]%2B)*@[A-Za-z0-9]%2B(\\.[A-Za-z0-9]%2B)*(\\.[A-Za-z]{2,})$");
var+result+=+pattern+.test(str);|code-block|syntax|javascript|1032272|以下情况不允许使用正则表达式：|1032273|abc@gmail..com
abc@gmail.com..|1032274|允许执行以下操作：|1032275|abc.efg@gmail.com
abc@gmail.com.my|1032276|来源：http://www.mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know/|offset|length|1032277|entityMap|0|LINK|mutability|MUTABLE|url|http://www.mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know/^0|0|0|0|0|0|0|3|2M|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|16|8|@]|9|@$Q|17|R|18|1|19]]|A|$]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

Javascript:

<pre><code>var pattern = new RegExp("^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$");
var result = pattern .test(str);
</code></pre>

 
The regex is not allowed for:

<pre><code>abc@gmail..com
abc@gmail.com..
</code></pre>

 
Allowed for:

<pre><code>abc.efg@gmail.com
abc@gmail.com.my
</code></pre>

Source: <a href="http://www.mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know/" rel="nofollow">http://www.mkyong.com/regular-expressions/10-java-regular-expression-examples-you-should-know/</a>

blocks|key|1247377|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1247378|function+isValidEmailAddress(emailAddress)+{
++++var+pattern+=+new+RegExp(/%5E([a-zA-Z0-9_\.\-])%2B\@(([a-zA-Z0-9\-])%2B\.)%2B([a-zA-Z0-9]{2,4})%2B$/);
++++return+pattern.test(emailAddress);
};|code-block|syntax|javascript|1247379|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this

<pre><code>function isValidEmailAddress(emailAddress) {
 var pattern = new RegExp(/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/);
 return pattern.test(emailAddress);
};
</code></pre>

blocks|key|1032299|text|您可以使用此函数|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1032300|+var+validateEmail+=+function+(email)+{

++++++++var+pattern+=+/%5E([a-z\d!#$%25&'*%2B\-\/=?%5E_`{%7C}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]%2B(\.[a-z\d!#$%25&'*%2B\-\/=?%5E_`{%7C}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]%2B)*%7C"((([+\t]*\r\n)?[+\t]%2B)?([\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]%7C\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*(([+\t]*\r\n)?[+\t]%2B)?")@(([a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]%7C[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.)%2B([a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]%7C[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.?$/i;


++++++++if+(pattern.test(email))+{
++++++++++++return+true;
++++++++}
++++++++else+{
++++++++++++return+false;
++++++++}
++++};|code-block|syntax|javascript|1032301|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you can use this function

<pre><code> var validateEmail = function (email) {

 var pattern = /^([a-z\d!#$%&amp;'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+(\.[a-z\d!#$%&amp;'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+)*|"((([ \t]*\r\n)?[ \t]+)?([\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*(([ \t]*\r\n)?[ \t]+)?")@(([a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.)+([a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.?$/i;


 if (pattern.test(email)) {
 return true;
 }
 else {
 return false;
 }
 };
</code></pre>

blocks|key|1032339|text|本机方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1032340|$("#myform").validate({
+//+options...
});

$.validator.methods.email+=+function(+value,+element+)+{
++return+this.optional(+element+)+%7C%7C+/[a-z0-9._%25%2B-]%2B@[a-z0-9.-]%2B\.[a-z]{2,4}/.test(+value+);
}|code-block|syntax|javascript|1032341|来源：https://jqueryvalidation.org/jQuery.validator.methods/|offset|length|1032342|entityMap|0|LINK|mutability|MUTABLE|url|https://jqueryvalidation.org/jQuery.validator.methods/^0|0|0|3|1I|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Native method:

<pre><code>$("#myform").validate({
 // options...
});

$.validator.methods.email = function( value, element ) {
 return this.optional( element ) || /[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}/.test( value );
}
</code></pre>

Source: <a href="https://jqueryvalidation.org/jQuery.validator.methods/" rel="nofollow noreferrer">https://jqueryvalidation.org/jQuery.validator.methods/</a>

I'm not too sure how to do this. I need to validate email addresses using regex with something like this:

<pre><code>[a-z0-9!#$%&amp;'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&amp;'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)
</code></pre>

Then I need to run this in a jQuery function like this: 

<pre><code>$j("#fld_emailaddress").live('change',function() { 
var emailaddress = $j("#fld_emailaddress").val();

// validation here? 

if(emailaddress){}

// end validation

$j.ajax({ 
 type: "POST", 
 url: "../ff-admin/ff-register/ff-user-check.php", 
 data: "fld_emailaddress="+ emailaddress, 
 success: function(msg)
 { 
 if(msg == 'OK') { 
 $j("#fld_username").attr('disabled',false); 
 $j("#fld_password").attr('disabled',false); 
 $j("#cmd_register_submit").attr('disabled',false); 
 $j("#fld_emailaddress").removeClass('object_error'); // if necessary
 $j("#fld_emailaddress").addClass("object_ok");
 $j('#email_ac').html('&amp;nbsp;&lt;img src="img/cool.png" align="absmiddle"&gt; &lt;font color="Green"&gt; Your email &lt;strong&gt;'+ emailaddress+'&lt;/strong&gt; is OK.&lt;/font&gt; ');
 } else { 
 $j("#fld_username").attr('disabled',true); 
 $j("#fld_password").attr('disabled',true); 
 $j("#cmd_register_submit").attr('disabled',true); 
 $j("#fld_emailaddress").removeClass('object_ok'); // if necessary
 $j("#fld_emailaddress").addClass("object_error");
 $j('#email_ac').html(msg);
 }
 }
 });
});
</code></pre>

Where does the validation go and what is the expression?

Validating email addresses using jQuery and regex

jQuery

我不太确定该怎么做。我需要使用regex验证电子邮件地址，如下所示：[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|...

问使用jQuery和正则表达式验证电子邮件地址
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