Regarding atleast one character of alphabet in textbox...

[senthilnathan1985]

Hello,
i have to check following things in textbox control.I need javascript for this.Can anyone help me.....

- be at least 1 character long
- contain at least 1 standard alphabetic character
- be a maximum of 40 characters including spaces (limited by text box maximum)

Thanks,
Senthilnathan.

[gits]

hi ...

have you tried something for your own already? post the code you already have ... you may use regEx or regular js-stringobject-methods for that ...

kind regards

[senthilnathan1985]

Hi,
I have used following code for number filteration...

<script language="JavaScript" type="text/javascript" >
function stringFilter (sender, args)
 
{
var s = window.event.srcElement.value;
 
filteredValues = "1234567890"; // Characters stripped out
var i;
 
var returnString = "";
 
for (i = 0; i < s.length; i++) { // Search through string and append to unfiltered values to returnString.
var c = s.charAt(i);if (filteredValues.indexOf(c) == -1)
 
returnString += c;
 
}
if ( s.length != returnString.length ) {
 
alert('Only alphabets are allowed!');
window.event.srcElement.value = returnString;
 
}
 
}
 
// End -->
 
</script>

Now i need javascript for Atleast one character should be alphabet....

Thanks,
Senthilnathan

[gits]

you may test for length > 0 because a string is an array of characters ... have a look at the following example that uses regEx for testing and should do what you want:

// your input-value
var txt = '788k jkjjlk';
 
function test_value(t) {
    var val = false;
 
    // strip the numbers
    var t1 = t.replace(/\d/g, '');
 
    if (/[a-z]/gi.test(t1) && t1.length > 0) {
        val = true;
    }
 
    return val;
}
 
// in our testcase the function returns true
test_value(txt);
 

kind regards

[gits]

and have a look how we can shorten the code ...

var txt = '788';
 
function test_value(t) {
    var t1 = t.replace(/\d/g, '');
    return (/[a-z]/gi.test(t1) && t1.length > 0);
}
 
test_value(txt);
 

here it will return false ... and only 2 lines for the check-code :) ...

kind regards