Page call:Copy codeThe Code is as follows: <Body>
<Input id = "txtNote"/>
You can also enter <input type = "text" id = "txtCount"/> characters
</Body>
<Mce: script type = "text/javascript"> <! --
Var lim = new limit ();
Lim.txt Note = document. getElementById ("txtNote ");
Lim.txt Limit = document. getElementById ("txtCount ");
Lim. limitCount = 20;
Lim. isbyte = true;
Lim. init ();
// --> </Mce: script>
</Html>
Text Box character length limitCopy codeThe Code is as follows: <INPUT onkeydown = if (event. keyCode = 13) event. keyCode = 9 onkeyup = "value = value. replace (/[^ 0-]/g, '');" maxLength = 11>
In this case, only the numbers and the maximum length must be 11 characters.
------ Solution --------------------------------------------------------
Are you sure you want to write the code above... How can the test fail ..
Isn't it? test there's no such thing. Now it's only limited to numbers and 11 characters.
------ Solution --------------------------------------------------------Copy codeThe Code is as follows: <INPUT onkeydown = if (event. keyCode = 13) event. keyCode = 9 onkeyup = "value = value. replace (/[^ 0-]/g, '');" maxLength = 11>
In this case, only the numbers and the maximum length must be 11 characters.
------ Solution --------------------------------------------------------Copy codeThe Code is as follows: <INPUT onkeydown = if (event. keyCode = 13) event. keyCode = 9 onkeyup = "value = value. replace (/[^ 0-]/g, '');" maxLength = 11>
In this case, only numbers and up to 11 characters can be entered ......
------ Solution --------------------------------------------------------Copy codeThe Code is as follows: if (document. form. mobile. value = "")
{
Alert ("your input is incorrect ");
Document. forma. mobile. focus ();
Return false;
}
Else
{
If (! /^ \ D {11} $. test (document. form. mobile. value ))
{Alert ("the number of digits you entered is incorrect ");
Document. forma. mobile. focus ();
Return false;
}
}
I don't know if this works...
------ Solution --------------------------------------------------------
HTML codeCopy codeThe Code is as follows: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html>
<Head>
<Title> control the number of characters in textarea </title>
<Style>
<! --
Form {
Padding: 0px;
Margin: 0px;
Font: 14px Arial;
}
Input.txt {/* set the text box separately */
Border: 1px inset # limit 8B;
Background-color: # ADD8E6;
}
Input. btn {/* button set separately */
Color: # pai8b;
Background-color: # ADD8E6;
Border: 1px outset # limit 8B;
Padding: 1px 2px 1px 2px;
}
-->
</Style>
<Script language = "javascript">
Function LessThan (oTextArea ){
// Return the boolean value required for the number of characters in the text box
Return oTextArea. value. length <oTextArea. getAttribute ("maxlength ");
}
</Script>
</Head>
<Body>
<Form method = "post" name = "myForm1" action = "addInfo. aspx">
<P> <label for = "name"> enter your name: </label>
<Input type = "text" name = "name" id = "name" class = "txt" value = "name" maxlength = "10"> </p>
<P> <label for = "comments"> I want to leave a message: </label> <br>
<Textarea name = "comments" id = "comments" cols = "40" rows = "4" maxlength = "50" onkeypress = "return LessThan (this ); "> </textarea> </p>
<P> <input type = "submit" name = "btnSubmit" id = "btnSubmit" value = "Submit" class = "btn">
<Input type = "reset" name = "btnReset" id = "btnReset" value = "Reset" class = "btn"> </p>
</Form>
</Body>
</Html>
------ Solution --------------------------------------------------------
HTML codeCopy codeThe Code is as follows: <! Doctype html public "-// W3C // dtd html 4.01 Transitional // EN" "http://www.w3.org/TR/html4/loose.dtd">
<Html>
<Head>
<Title> phone number detection </title>
<Meta name = "Generator" content = "EditPlus">
<Meta name = "Author" content = "Dsmart">
<Meta name = "Keywords" content = "">
<Meta name = "Description" content = "">
</Head>
<Body>
Phone number: <input id = "phone" type = "value" onblur = "checkPhone ()"/>
<Script type = "text/javascript">
Function checkPhone (){
Var phone = document. getElementById ("phone"). value;
If (phone = ""){
Alert ("Enter the number ");
} Else if (! (/^ \ D {11 }$/g. test (phone) {// enter an integer of 11
//} Else if (! (/^ 13 \ d {9} $/g. test (phone) | (/^ 15 [0-35-9] \ d {8} $/g. test (phone) | (/^ 18 [05-9] \ d {8} $/g. test (phone )))){
// Check whether the mobile phone number entered by the user is correct. The phone numbers include 13 series and 150-159 (except 154), 180, 185, 186, 187, 188, and 189. The length is 11 characters.
Alert ("Please input 11 integers ");
} Else {
Alert ("OK ");
}
}
</Script>
</Body>
</Html>
------ Solution --------------------------------------------------------Copy codeThe Code is as follows: <INPUT onkeydown = if (event. keyCode = 13) event. keyCode = 9 onkeyup = "value = value. replace (/[^ 0-]/g, '');" maxLength = 11>
In this case, only numbers and up to 11 characters can be entered ......
In this way, there is a prompt, but it does not have a limit. When the input is less than 11 bits, it can still be submitted. Is this controlled by js?
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