Menu
Ok i’ve been struggling with this script all day and i can’t figure out how to fix this.
The idea is that i have a form with a name field. this field can only contain letters.
this is my script:
<script language=”javascript”>
function CheckCharacters(thisform) {
var str = thisform.naam.value
var slen = str.length
for (i=0; i < slen; i++) {
var ch = str.substring(i,i+1)
if ( (ch < “a” || “z” < ch) && (ch < “A” || “Z” < ch) && ch != ” “) {
alert(“Teken ” + (i+1) + ” in de naam is niet toegestaan”)
thisform.naam.focus()
return false
}
}
}
</script>
my form looks like this:
<FORM >
<INPUT TYPE=”text” SIZE=”35″ MAXLENGTH=”20″ NAME=”naam” VALUE=”” >
<INPUT TYPE=”submit” VALUE=”Volgende” onclick=”return CheckCharacters(this.form)”>
</form>
this works, but only if i click the button, if i hit enter it still submits the form. so i try this:
<FORM onsubmit=”return CheckCharacters(this.form)”>
<INPUT TYPE=”text” SIZE=”35″ MAXLENGTH=”20″ NAME=”naam” VALUE=”” >
<INPUT TYPE=”submit” VALUE=”Volgende” >
</form>
‘
but this doesnt work at all! I get some errors and the form always submits.
What am i doing wrong? a lot of tutorials i found only go about onclick validation thereby completely forgetting that if you press enter is stil submits.