Resolved Search for special characters

javanew · 09-21-2011, 02:42 AM

First of all thanks for all the help you are providing.

I am looking to alert a user if they type in an character that I am going to not allow for their input box

Code:

function IsExc (str){
var AllChr = "~ # $ % ^ { } [ ] ' ,";
var AC= AllChr.split(" ");
var SC = 0;
   for (SC=0; SC <= AC.length; SC++){
	var ACS = AC[SC];
	if (str.search(ACS)  >0 ) alert ('Cannot use the characters' + AllChr )
   }
}

For reasons I don't understand the code will not work

Old Pedant · 09-21-2011, 03:11 AM

Easier way:

Code:

function IsExc (str)
{
   var ng = /[\~\#\$\%\^\{\}\[\]\'\,]/;
   if ( ng.test(str) ) alert("Illegal character");
}

Or maybe better:

Code:

function IsExc (str)
{
   var ng = /[^\w\s]/;
   if ( ng.test(str) ) alert("Illegal character--only letters, digits, underline, and space allowed");
}

Old Pedant · 09-21-2011, 03:13 AM

If you insist on doing it one character at a time:

Code:

function IsExc (str)
{
    var AllChr = "~#$%^{}[]',";
    var SC = 0;
    for (SC=0; SC <= AllChr.length; SC++)
    {
	if (str.indexOf( AllChr.charAt(SC) ) >= 0 ) alert ('Cannot use the character ' + AllChr.charAt(SC) );
    }
}

javanew · 09-21-2011, 10:20 AM

Thank you very much