JavaScript: Forms Script - Validation Number or Character

Main Forms Script Validation Number or Character

<title>script.omduena.com: JavaScript, java script, javascripts, script, javascript free code!</title>
<SCRIPT LANGUAGE="JavaScript">


<!-- Begin

function validate(field) {

var valid = "abcdefghijklmnopqrstuvwxyz0123456789"

var ok = "yes";

var temp;

for (var i=0; i<field.value.length; i++) {

temp = "" + field.value.substring(i, i+1);

if (valid.indexOf(temp) == "-1") ok = "no";

}

if (ok == "no") {

alert("Invalid entry!  Only characters and numbers are accepted!");

field.focus();

field.select();

}

//  End -->

</script>

</HEAD>

<BODY>

<br>

</form>

</center>

<font face="arial, helvetica" size="-2">Free Scripts Sources<br>

by <a href="http://script.omduena.com">The JavaScript Source</a></font>

</center><p>

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