check input data is numeric or character

241 100+

how can check the input data is character or numeric if input data accept the numeric and input data is character then error message

Dec 4 '07 #1

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28107

mzmishra

390

Expert 256MB

Expand|Select|Wrap|Line Numbers

 function isNumber (InString)  {

    if(InString.length==0) return (false);

    var RefString="1234567890";

    for (Count=0; Count < InString.length; Count++)  {

        TempChar= InString.substring (Count, Count+1);

        if (RefString.indexOf (TempChar, 0)==-1)  

            return (false);

    }

    return (true);

}

Dec 4 '07 #2

gits

5,390

Expert Mod 4TB

hi ...

you may simply use javascripts isNaN method or a regExp ... i assume you don't want decimal input? so the shortest way is the regExp:

Expand|Select|Wrap|Line Numbers

 
function chk_val(val) {

    return /^\d+$/.test(val);

}

kind regards

Dec 4 '07 #3

idsanjeev

241

100+

i wants to input type accept numeric field if character is entered then alert message you can enter only employee number

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<script language="Javascript">

function gofirst()

{

  window.location = "brvoice.asp"

}

function chk_val(val) {

    return /^\d+$/.test(val);

}

</script>

<body background="back2.gif">

<form name="myform" method="POST" action="login.asp">

<div style="Position:Absolute; top:150; left:275">

<center><h2><font face="arial">Welcome To Login Page</font></h2>

</center>

<table border = '0' align = 'center' width = '500' height = '70'>

  <tr>

    <td  align=right>&nbsp;&nbsp;&nbsp;<font face=Arial size=4><b>User ID</b></font></td>

    <td >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type= 'text' name="empno"  onBlur="chk_val()"></td>

  </tr>

  <tr>

    <td align=right>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font face=Arial size=4 ><b>Password</font></b></td>

    <td >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type= "password" name= "password"></td></font>

  </tr>

</table>

<table style="Position:relative; top:20; left:225"> 

<tr>

</td><td align='center'><input type="submit" name="submit" value="Login" ></td>

<td align="right"><input type="button" name="Close" value="Close" onclick="window.close()"></tr>

</table>

Dec 4 '07 #4

gits

5,390

Expert Mod 4TB

hi ...

simply adapt it:

Expand|Select|Wrap|Line Numbers

 
function chk_val(val) {

    var chk = /^\d+$/.test(val);
 
    if (!chk) {

        alert('please input numbers only');

    }

}

kind regards

Dec 4 '07 #5

idsanjeev

241

100+

i wants to if display alert message only when character field is entered and not goes in password input if alert message is display its still in input employee no

Dec 4 '07 #6

gits

5,390

Expert Mod 4TB

Expand|Select|Wrap|Line Numbers

 function chk_val(obj) {

    var chk = /^\d+$/.test(obj.value);
 
    if (!chk) {

        alert('please input numbers only');

        obj.focus();

    }

}

later on in your html put this:

[HTML]<input type="text" name="empno" onblur="chk_val(this);">[/HTML]
kind regards

Dec 4 '07 #7

idsanjeev

241

100+

Thanks i got it

Dec 6 '07 #8

gits

5,390

Expert Mod 4TB

glad to hear that ... post back to the forum anytime you have more questions

kind regards

Dec 6 '07 #9

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