<SCRIPT LANGUAGE="JavaScript"> <!-- Original: Mikhail Esteves (miks80@yahoo.com) --> <!-- Web Site: http://www.freebox.com/jackol --> <!-- Begin var mikExp = /[$\\@\\\#%\^\&\*\(\)\[\]\+\_\{\}\`\~\=\|]/; function dodacheck(val) { var strPass = val.value; var strLength = strPass.length; var lchar = val.value.charAt((strLength) - 1); if(lchar.search(mikExp) != -1) { var tst = val.value.substring(0, (strLength) - 1); val.value = tst; } } function doanothercheck(form) { if(form.value.length < 1) { alert("Bitte eine Eingabe."); return false; } if(form.value.search(mikExp) == -1) { alert("Korrekte Eingabe"); return false; } else { alert("Hinweis, die folgenden Zeichen\n\r\n\r@ $ % ^ & * # ( ) [ ] \\ { + } ` ~ = | \n\r\n\rsind nicht erlaubt!\n"); form.select(); form.focus(); return false; } alert("Korrekte Eingabe"); return false; } // End --> </script>

<form name=xyz onSubmit="return doanothercheck(this.txtTerm);"> <input type="text" name="txtTerm" size="35" maxlength="50" value="" onKeyUp="javascript:dodacheck(xyz.txtTerm);"> <br> <input type=submit value=Check> </form>