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Use a JavaScript regular expression to verify a non-zero positive integer: (^ [1-9] d * $ or ^ ([1-9] [0-9] *) {1, 3} $ or ^ +? [1-9] [0-9] * $)

Source: Internet
Author: User
Tags regular expression
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For more information, see the instance code:

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Title> </title>

<Script type = "text/javascript">

Functionvalidation (){

Varval = document. getElementById ("txtNumber"). value;

Varregu =/^-[1-9] \ d * $ /;

If (val! = ""){

If (! Regu. test (val )){

Document. getElementById ("labResult"). style. color = "red ";

Document. getElementById ("labResult"). innerHTML = "verification failed! ";

} Else {

Document. getElementById ("labResult"). style. color = "green ";

Document. getElementById ("labResult"). innerHTML = "verification successful! ";

}

}

}

</Script>

</Head>

<Body>

<Input id = "txtNumber" name = "txtNumber" type = "text"/>

<Input id = "btnValidation" name = "btnValidation" type = "button" value = "verify" onclick = "validation ()"/>

Verification result: <label id = "labResult"> </label>

</Body>

</Html>

Portal

Use a JavaScript regular expression to verify non-positive integers:Http://www.111cn.net/wy/js-ajax/125202.htm

Validate a non-negative integer: http://www.111cn.net/wy/js-ajax/125206.htm using a JavaScript regular expression

Validate a non-zero negative integer: http://www.111cn.net/wy/js-ajax/125210.htm using a JavaScript regular expression

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