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#1
May 2nd, 2008, 03:03 PM
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Validate numbers
Hi all. I would like to validate a number a user enters into my form. This number can be 5 or 6 numerical numbers or have 6 numeric numbers seperated by a dash with 6 more numeric numbers like so 123456-123456. How can I do this. I'm stumped on this one. Please help me.
Tracy
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#2
May 2nd, 2008, 03:06 PM
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Are the numbers randomly generated?
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#3
May 2nd, 2008, 03:14 PM
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Quote:
Regular expressions. /^(?:\d{5,6}|\d{6}-\d{6})$/ will match the pattern you described. Refer to Mozilla's Developer Section to see how to match a regular expression against a string.
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#4
May 2nd, 2008, 05:59 PM
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Here is what I have so far but I can't get it to work. Please help.
Tracy Code:
<script>
function validateCharge(theForm){
//VALIDATE CHARGE
if(theForm.charge){
if(!theForm.charge.value.match(/^\d{5}$/) || !theForm.charge.value.match(/^\d{6}$/)){
alert("Please input a valid Charge Account!")
theForm.charge.style.backgroundColor='pink';
theForm.charge.focus();
return false
}}
return (true);
}
</script>
<form method="POST" name="theForm" onsubmit="return validateCharge(theForm)" action="--WEBBOT-SELF--">
<input type="text" name="charge" size="20"></p>
<p><input type="submit" value="Submit" name="B1"><input type="reset" value="Reset" name="B2"></p>
</form>
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#5
May 2nd, 2008, 07:32 PM
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The biggest problem with your code is here:
Code:
<form method="POST" name="theForm" onsubmit="return validateCharge(theForm)" action="--WEBBOT-SELF--"> Change onsubmit="return validateCharge(theForm)" to onsubmit="return validateCharge(this)" and it might start rejecting input of anything other than five or six consecutive digits.
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#6
May 3rd, 2008, 02:06 AM
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Code:
return (true); is useless and redundant. If no certain value returned, the function returns undefined, which will allow the submit same as a true returned, because the only value which prevents the submit action is false ex: onsubmit="return false"
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