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Checking fields against a pattern
- Thread starter Markh51
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- Thread starter
- #2
<html>
<head>
<script language= "JavaScript">
function ckdec() {
var refstring = /^0/; //sets ref for char to be searched for
var mystrg = document.form1.testval.value;
if (mystrg.search(refstring) > -1) { // if search returns found value > -1
alert ("text sarts with a 0!"
; } else { alert ("text doesn't start with a 0!"
;}}
</script>
</head>
<body>
<form name="form1">
<input type="text" name="testval" size="15" value="enter a num">
<input type="button" value="click to test" onClick="ckdec();">
</form>
</body
</html>
Hope it helps.
- Thread starter
- #4
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- #5
- Thread starter
- #7
Hi Mark,
It is very confusing. Working with regular expressions.
This tutorial is very helpful it has about 3 Chapters:
Looks to me like your last: "^[1-9][0-9"
Since you left "0" out of the range by using "[1-9]"
should work O.K.>>>but by my tests using variables
such as "+lmin","+lmax+" will have to be replaced with
literals such as {2,9}
It is very confusing. Working with regular expressions.
This tutorial is very helpful it has about 3 Chapters:
Looks to me like your last: "^[1-9][0-9"
Since you left "0" out of the range by using "[1-9]"
should work O.K.>>>but by my tests using variables
such as "+lmin","+lmax+" will have to be replaced with
literals such as {2,9}
Another thing to consider is that your leaving an opening
with your first [1-9] statement--there is no limit to the
amount of times digits can occur....
You might consider /^[1-9]{1}[0-9]{1,6}$/ this statement
limits your first occurence range to 1 then your second
occurence range is "1 not more than 6" for a total of
7 digits.
What I meant to say earlier was that using those variables
inside the "{" "}" didn't work for me at all.
with your first [1-9] statement--there is no limit to the
amount of times digits can occur....
You might consider /^[1-9]{1}[0-9]{1,6}$/ this statement
limits your first occurence range to 1 then your second
occurence range is "1 not more than 6" for a total of
7 digits.
What I meant to say earlier was that using those variables
inside the "{" "}" didn't work for me at all.
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