How to Validate Multiple Dates in Same Form

[heathL]

Here is the script I'm using for the date validation for ReleaseDate (in Red) but I also need to validate for EffectiveDate. How would I incorporate that? I am new at this so can use any help. Thanks.


<script language = &quot;Javascript&quot;>

// Declaring valid date character, minimum year and maximum year
var dtCh= &quot;/&quot;;
var minYear=1900;
var maxYear=2100;

function isInteger(s){
var i;
for (i = 0; i < s.length; i++){
// Check that current character is number.
var c = s.charAt(i);
if (((c < &quot;0&quot || (c > &quot;9&quot)) return false;
}
// All characters are numbers.
return true;
}

function stripCharsInBag(s, bag){
var i;
var returnString = &quot;&quot;;
// Search through string's characters one by one.
// If character is not in bag, append to returnString.
for (i = 0; i < s.length; i++){
var c = s.charAt(i);
if (bag.indexOf(c) == -1) returnString += c;
}
return returnString;
}

function daysInFebruary (year){
// February has 29 days in any year evenly divisible by four,
// EXCEPT for centurial years which are not also divisible by 400.
return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray {
for (var i = 1; i <= n; i++) {
this = 31
if (i==4 || i==6 || i==9 || i==11) {this = 30}
if (i==2) {this = 29}
}
return this
}

function isDate(dtStr){
var daysInMonth = DaysArray(12)
var pos1=dtStr.indexOf(dtCh)
var pos2=dtStr.indexOf(dtCh,pos1+1)
var strMonth=dtStr.substring(0,pos1)
var strDay=dtStr.substring(pos1+1,pos2)
var strYear=dtStr.substring(pos2+1)
strYr=strYear
if (strDay.charAt(0)==&quot;0&quot; && strDay.length>1) strDay=strDay.substring(1)
if (strMonth.charAt(0)==&quot;0&quot; && strMonth.length>1) strMonth=strMonth.substring(1)
for (var i = 1; i <= 3; i++) {
if (strYr.charAt(0)==&quot;0&quot; && strYr.length>1) strYr=strYr.substring(1)
}
month=parseInt(strMonth)
day=parseInt(strDay)
year=parseInt(strYr)
if (pos1==-1 || pos2==-1){
alert(&quot;The date format should be : mm/dd/yyyy&quot
return false
}
if (strMonth.length<1 || month<1 || month>12){
alert(&quot;Please enter a valid month&quot
return false
}
if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
alert(&quot;Please enter a valid day&quot
return false
}
if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
alert(&quot;Please enter a valid 4 digit year between &quot;+minYear+&quot; and &quot;+maxYear)
return false
}
if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
alert(&quot;Please enter a valid date&quot
return false
}
return true
}

function ValidateForm(){
var dt=document.form1.ReleaseDate
if (isDate(dt.value)==false){
dt.focus()
return false
}
return true

}
</script>

 

[onpnt]

all you need to is run the function the second value
rate now you are running the validation on teh variable dt
here

function ValidateForm(){
var dt=document.form1.ReleaseDate

so you could throw a and condition in there if you wanted to and say

var dt2=document.form1.other field
if ((isDate(dt.value)==false && isDate(dt2.value)==false)){
return false
}
return true
}
and if you wanted to keep the focus attribute then validate them seperately as

function ValidateForm(){
var dt=document.form1.ReleaseDate
var dt2=document.form1.other field
if (isDate(dt.value)==false){
dt.focus()
return false
}
if(isDate(dt2.value)==false) {
dt2.focus()
return true
}
[color] _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

http://www.onpntwebdesigns.com/aspTut4.asp

 

[onpnt]

apologies error in my copy/paste methods

if(isDate(dt2.value)==false) {
dt2.focus()
return false
} _________________________________________________________
for the best results to your questions: FAQ333-2924
Is your question a most FAQ?? Find out here FAQ333-3048

http://www.onpntwebdesigns.com/aspTut4.asp

 

[heathL]

Thanks so much for your help. I made a few minor modifications and it worked like a charm.
H

 

[aks78]

Hello, I have about 30 date fields in my form, and I'd like to be able to check them using onChange or onBlur instead of onSubmit. Can anyone help me modify this code to be able to do this? Thanks.