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Check Form Input For Invalid Characters

Posted on 2004-04-23
5
Medium Priority
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661 Views
Last Modified: 2008-03-10
I can't get this to work. what went wrong?

<SCRIPT>
function checkSearch(input)
{
var value = true;
var notValidChars = /[^a-z0-9]/i;

if( notValidChars.test(input.value) )
{
alert("Please do not use invalid symbols!");
input.focus();
value = false;
}
return value;
}
</SCRIPT>

<body>
<form method="post" action="/cgi-bin/check.cgi" onsubmit="return checkSearch(this.Search)">
<p>&nbsp;</p>
<p><input type="text" name="T1" size="20"></p>
<p><input type="submit" value="Submit" name="B1">
<input type="reset" value="Reset" name="B2"></p>
</form>
</body>
0
Comment
Question by:Cleavis
[X]
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5 Comments
 
LVL 31

Expert Comment

by:GwynforWeb
ID: 10898690
Try this

<SCRIPT>
function checkSearch(input)
{
var value = true;
var notValidChars = /[^a-z0-9]/i;

if( notValidChars.test(input.value) )
{
alert("Please do not use invalid symbols!");
input.focus();
value = false;
}
return value;
}
</SCRIPT>

<body>
<form method="post" action="/cgi-bin/check.cgi" onsubmit="return checkSearch(this.T1)">
<p>&nbsp;</p>
<p><input type="text" name="T1" size="20"></p>
<p><input type="submit" value="Submit" name="B1">
<input type="reset" value="Reset" name="B2"></p>
</form>
</body>
0
 

Author Comment

by:Cleavis
ID: 10898720
that works for T1.

is there a way to check all input fields in the form?
0
 
LVL 31

Accepted Solution

by:
GwynforWeb earned 2000 total points
ID: 10898757
<SCRIPT>
function checkSearch(form){
var notValidChars = /[^a-z0-9]/i;
for (i=0;i<form.elements.length;i++)
 if( notValidChars.test(form.elements[i].value) )
 {
  alert("Please do not use invalid symbols!");
  form.elements[i].focus();
  return false;
 }
return true
}
</SCRIPT>

<body>
<form method="post" action="/cgi-bin/check.cgi" onsubmit="return checkSearch(this)">
<p>&nbsp;</p>
<p><input type="text" name="T1" size="20"></p>
<p><input type="text" name="T2" size="20"></p>
<p><input type="text" name="T3" size="20"></p>
<p><input type="submit" value="Submit" name="B1">
<input type="reset" value="Reset" name="B2"></p>
</form>
</body>
0
 

Author Comment

by:Cleavis
ID: 10898794
Thank You.
0
 
LVL 31

Expert Comment

by:GwynforWeb
ID: 10898891
Thanks for the points, GfW
0

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