jquery Common regular validation [go]
Basic Knowledge:
How to create a regular object in JS:
-Use the RegExp () constructor method, such as Var patten=new RegExp ("S $");
-Use regular direct volume methods such as: Var patten=/s$/;
Note: Just as a string literal is defined as a character enclosed in quotation marks (""), the direct amount of the regular expression is also defined as a character that is contained between a pair of slashes (/), and a regular global identifier at the end of the slash.
verify the number of text inputs
<script type= "Text/javascript" src= "Https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" >< /script>
<script type= "Text/javascript" >
function Strlencalc (obj, Showmeg, maxlen) {
var v = obj.val (), Charlen = 0, Curlen = maxlen, len = v.length;
for (var i = 0; i < v.length; i++) {
if (V.charcodeat (i) < 0 | | v.charcodeat (i) > 255) {
Curlen-= 1;
}
}
if (Curlen >= len) {
$ ("#" +showmeg). HTML ("can also input <strong>" +math.floor ((Curlen-len)/2) + "</strong> characters"). CSS (' color ', ');
$ ("#subBtn"). Removeattr ("Disabled");
} else {
$ ("#" +showmeg). HTML ("Already over <strong>" +math.ceil ((Len-curlen)/2) + "</strong> characters"). CSS (' color ', ' #FF0000 ') ;
$ ("#subBtn"). attr ("Disabled", "disabled");
}
}
</script>
<textarea tabindex= "One" onkeyup= "Strlencalc ($ (this), ' Showmeg ',") "Value=" "class=" px "name=" subject "id=" Subject "></textarea>
<span id= "Showmeg" > can also input <strong>40</strong> kanji </span>
<input type= "Submit" id= "Subbtn" value= "release"/>
Verify if it is a number
<script type= "Text/javascript" >
function Boolnumeric (obj)
{
var objvalue=$ (obj). val ();
if (!isnan (ObjValue)) {
Alert ("is a number!");
}
else{
Alert ("Not a number!")
}
}
</script>
Verify Mailbox
<script type= "Text/javascript" >
function Verifyemail (obj)
{
var pattern =/^[a-za-z0-9_\-]{1,}@[a-za-z0-9_\-]{1,}\. [a-za-z0-9_\-.] {1,}$/;
var objvalue=$ (obj). val ();
if (!pattern.test (ObjValue)) {
Alert ("Bad mailbox format!");
}
}
</script>
Verify phone number (phone number, landline number)
<script type= "Text/javascript" >
function Verifytelnumber (obj)
{
var pattern_mobile =/^ (?: 13\d|15\d) \d{5} (\d{3}|\*{3}) $/; Phone format, need to change
var pattern_phone=/^ ((0\d{2,3})-)? (\d{7,8}) (-(\d{3,}))? $/;
var objvalue=$ (obj). val ();
if (!pattern_mobile.test (objvalue) | |!pattern_phone.test (objvalue)) {
Alert ("Please fill in the correct phone number, such as: 13755222222 or 0312-6666666");
}
}
</script> Transferred from: http://skybirdzw.blog.163.com/blog/static/725706262012482124880/
Common regular validation for jquery
