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Date Validation YYYY/MM/DD

Posted on 2008-10-24
2
2,668 Views
Last Modified: 2012-05-05
Hi All

I have a code below that validate dd/mm/yyyy but i need to validate it in yyyy/mm/dd. where should i modify or which code should be modify?
<script language = "Javascript">

/**

 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)

 */

// Declaring valid date character, minimum year and maximum year

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 strMonth=dtStr.substring(0,pos1)

	var strDay=dtStr.substring(pos1+1,pos2)

	var strYear=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){

		return false

	}

	if (strMonth.length<1 || month<1 || month>12){

		return false

	}

	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){

		return false

	}

	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){

		return false

	}

	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){

		return false

	}

return true

}
 

function ValidateForm(){

	var dt=document.frmSample.txtDate

	if (isDate(dt.value)==false){

		dt.focus()

		return false

	}

    return true

 }
 

</script>

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Question by:bosscat
2 Comments
 
LVL 16

Accepted Solution

by:
sh0e earned 125 total points
ID: 22801877

<script language = "Javascript">

/**

 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)

 */

// Declaring valid date character, minimum year and maximum year

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){

                return false

        }

        if (strMonth.length<1 || month<1 || month>12){

                return false

        }

        if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){

                return false

        }

        if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){

                return false

        }

        if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){

                return false

        }

return true

}

 

function ValidateForm(){

        var dt=document.frmSample.txtDate

        if (isDate(dt.value)==false){

                dt.focus()

                return false

        }

    return true

 }

 

</script>

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Author Comment

by:bosscat
ID: 22801981
thanks sh0e!
0

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