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View Full Version : Date Validation, HELP!!



Brad_Armitage
05-26-2004, 07:05 PM
I have 2 scripts on my page. One that validates dates and the other validates the form's text fields:



/* Validate Date Script*/
var dtCh= "-";
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 < "0") || (c > "9"))) return false;
}
// All characters are numbers.
return true;
}

function stripCharsInBag(s, bag){
var i;
var returnString = "";
// 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(n) {
for (var i = 1; i <= n; i++) {
this[i] = 31
if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
if (i==2) {this[i] = 29}
}
return this
}

function isDate(dtStr){
var daysInMonth = DaysArray(12)
var pos1=dtStr.indexOf(dtCh)
var pos2=dtStr.indexOf(dtCh,pos1+1)
var strYear=dtStr.substring(0,pos1)
var strMonth=dtStr.substring(pos1+1,pos2)
var strDay=dtStr.substring(pos2+1)
strYr=strYear
if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
for (var i = 1; i <= 3; i++) {
if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
}
month=parseInt(strMonth)
day=parseInt(strDay)
year=parseInt(strYr)
if (pos1==-1 || pos2==-1){
alert("Please enter a date in the following format: YYYY-MM-DD")
return false
}
if (strMonth.length<1 || month<1 || month>12){
alert("Please enter a valid 2 digit month ie. 01 = January, 12 = December")
return false
}
if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
alert("Please enter a valid day of the month")
return false
}
if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
alert("Please enter a valid 4 digit year")
return false
}
if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
alert("Please enter a valid date")
return false
}
return true
}




/* Validate Form Script */
function ValidateForm(){
var dt1=document.IMCoutageForm.plannedDate
var dt2=document.IMCoutageForm.estrestoreDate
var dt3=document.IMCoutageForm.dispatchDate
var dt4=document.IMCoutageForm.restoreDate
var time1=document.IMCoutageForm.plannedTime
var time2=document.IMCoutageForm.estrestoreTime
var time3=document.IMCoutageForm.dispatchTime
var time4=document.IMCoutageForm.restoreTime

// Validate Planned Date/Time
if (dt1.value != "" || time1.value != "")
{
if (isDate(dt1.value)==false){
dt1.focus();
return false;
}

if (IsValidTime(time1.value)==false){
time1.focus();
return false;
}
}

// Validate Estimated Restore Date/Time
if (dt2.value != "" || time2.value != "")
{
if (isDate(dt2.value)==false){
dt2.focus();
return false;
}

if (IsValidTime(time2.value)==false){
time2.focus();
return false;
}
}

// Validate Dispatched Date/Time
if (dt3.value != "" || time3.value != "")
{
if (isDate(dt3.value)==false){
dt3.focus();
return false;
}

if (IsValidTime(time3.value)==false){
time3.focus();
return false;
}
}

// Validate Restored Date/Time
if (dt4.value != "" || time4.value != "")
{
if (isDate(dt4.value)==false){
dt4.focus();
return false;
}

if (IsValidTime(time4.value)==false){
time4.focus();
return false;
}
}

return true;
}


With the help of my current scripts, can anyone tell me how I might add a function that checks to see if the month and day between 1 and 9 have a 0 in front of them when the date is entered into the text fields listed above (plannedDate, estrestoreDate, dispatchDate, restoreDate). I either want it to automatically enter the zero if they forget or have a pop-up box remind them too, right now it leaves the month and day as: january 1st 2004 as 2004-1-1.
Thanks for any help. ;)

Willy Duitt
05-26-2004, 07:57 PM
<script type="text/javascript">
function format(number){
var zero="";
if(number<10 && number!=0) zero+="0";
return zero+number.toString();
}
</script>

<form>
<input type="text" onchange="this.value=format(this.value)">
</form>

Garadon
05-26-2004, 08:09 PM
I use lines like this to enforce such things


var month='00'.substring(0, 2-(''+month).length)+month;



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