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Form Validation - No Capitals Allowed! 1
- Thread starter canajun
- Start date
-
1
- #2
it would be far easier to change the values to lower case
example
<input type="text" name="lowercaps" onChange="javascript:this.value=this.value.toLowerCase();"> Just a suggestion: faq183-874
admin@onpntwebdesigns.com
example
<input type="text" name="lowercaps" onChange="javascript:this.value=this.value.toLowerCase();"> Just a suggestion: faq183-874
admin@onpntwebdesigns.com
- Thread starter
- #3
try this
<html>
<head>
<SCRIPT>
function checkCase()
{
str = document.form1.lowercaps.value
// value to test
strLen = document.form1.lowercaps.value.length
// length for loop
for(i=0; i <= strLen-1; i++) {
if (str.charAt(i) < "a" || str.charAt(i) > "z"
{
// test for a character a to z
// for upper cahnge to A to Z
alert("Only lower case values are valid!"
return
}
}
}
</SCRIPT>
</head>
<body>
<form name="form1">
<input type="text" name="lowercaps" onBlur="return checkCase()">
</form>
</body>
</html> Just a suggestion: faq183-874
admin@onpntwebdesigns.com
<html>
<head>
<SCRIPT>
function checkCase()
{
str = document.form1.lowercaps.value
// value to test
strLen = document.form1.lowercaps.value.length
// length for loop
for(i=0; i <= strLen-1; i++) {
if (str.charAt(i) < "a" || str.charAt(i) > "z"
{// test for a character a to z
// for upper cahnge to A to Z
alert("Only lower case values are valid!"
;return
}
}
}
</SCRIPT>
</head>
<body>
<form name="form1">
<input type="text" name="lowercaps" onBlur="return checkCase()">
</form>
</body>
</html> Just a suggestion: faq183-874
admin@onpntwebdesigns.com
after looing at that nasty loop I don't know why I did it that way. much easier to use a regex. try this
str = document.form1.lowercaps.value
var patrn = /^[a-z]+$/;
if (!(patrn.test(str))) {
alert("invalid!"
return false;
Just a suggestion: faq183-874
admin@onpntwebdesigns.com
str = document.form1.lowercaps.value
var patrn = /^[a-z]+$/;
if (!(patrn.test(str))) {
alert("invalid!"
;return false;
Just a suggestion: faq183-874
admin@onpntwebdesigns.com
- Thread starter
- #6
- Thread starter
- #7
use the select() function to select the contents of the field and the focus() function to focus on it.
document.form1.lowercaps.select();
document.form1.lowercaps.focus(); Just a suggestion: faq183-874
admin@onpntwebdesigns.com
document.form1.lowercaps.select();
document.form1.lowercaps.focus(); Just a suggestion: faq183-874
admin@onpntwebdesigns.com
- Thread starter
- #9
- Status
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