/**
 * 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;


/*********************************public method for deveploer used start********************************/
function isMail(email) {
    var x = email;
    var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (!filter.test(x)) {
        return false;
    }
    return true;
}

function isTel(tel) {
    var stripped = tel.replace(/[\(\)\.\-\#\ ]/g, '');

    var b = isNumber(stripped);
    if(b) {
        if (tel == "") {
            return false;
        } else if (isNaN(parseInt(stripped))) {
            return false;
        }
        return true;
    } else {
        return false;
    }
}

function isPhone(phone) {
    var stripped = phone.replace(/[\(\)\.\-\#\ ]/g, '');

    var b = isNumber(stripped);
    if(b) {
        if (isLength(stripped, 10)) {
            if (phone == "") {
                return false;
            } else if (isNaN(parseInt(stripped))) {
                return false;
            }

            return true;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

function isId(id) {
    var acc = 0;
    d0 = id.charAt(0);
    d1 = id.charAt(1);
    d2 = id.charAt(2);
    d3 = id.charAt(3);
    d4 = id.charAt(4);
    d5 = id.charAt(5);
    d6 = id.charAt(6);
    d7 = id.charAt(7);
    d8 = id.charAt(8);
    d9 = id.charAt(9);
    if ((d0 == "A") || (d0 == "a")) { acc = 10; }
    else if ((d0 == "B") || (d0 == "b")) { acc = 11; }
    else if ((d0 == "C") || (d0 == "c")) { acc = 12; }
    else if ((d0 == "D") || (d0 == "d")) { acc = 13; }
    else if ((d0 == "E") || (d0 == "e")) { acc = 14; }
    else if ((d0 == "F") || (d0 == "f")) { acc = 15; }
    else if ((d0 == "G") || (d0 == "g")) { acc = 16; }
    else if ((d0 == "H") || (d0 == "h")) { acc = 17; }
    else if ((d0 == "J") || (d0 == "j")) { acc = 18; }
    else if ((d0 == "K") || (d0 == "k")) { acc = 19; }
    else if ((d0 == "L") || (d0 == "l")) { acc = 20; }
    else if ((d0 == "M") || (d0 == "m")) { acc = 21; }
    else if ((d0 == "N") || (d0 == "n")) { acc = 22; }
    else if ((d0 == "P") || (d0 == "p")) { acc = 23; }
    else if ((d0 == "Q") || (d0 == "q")) { acc = 24; }
    else if ((d0 == "R") || (d0 == "r")) { acc = 25; }
    else if ((d0 == "S") || (d0 == "s")) { acc = 26; }
    else if ((d0 == "T") || (d0 == "t")) { acc = 27; }
    else if ((d0 == "U") || (d0 == "u")) { acc = 28; }
    else if ((d0 == "V") || (d0 == "v")) { acc = 29; }
    else if ((d0 == "W") || (d0 == "w")) { acc = 30; }
    else if ((d0 == "X") || (d0 == "x")) { acc = 31; }
    else if ((d0 == "Y") || (d0 == "y")) { acc = 32; }
    else if ((d0 == "Z") || (d0 == "z")) { acc = 33; }
    else if ((d0 == "I") || (d0 == "i")) { acc = 34; }
    else if ((d0 == "O") || (d0 == "o")) { acc = 35; }
    if (acc == 0) {
        return false;
    } else {
        accstr = new String(acc);
        acc_1 = (accstr).charAt(0);
        acc_2 = (accstr).charAt(1);
        certsum = 1*acc_1 + 9*acc_2 + 8*d1 + 7*d2 + 6*d3 + 5*d4 + 4*d5 + 3*d6 + 2*d7 + 1*d8;
        certsum_2 = parseInt(certsum%10);
        certsum_3 = 0;
        if (certsum_2 > 0) {
            certsum_3 = 10 - certsum_2;
        }

        if (d9 != certsum_3) {
            return false;
        }
    }
    
    return true;
}

function isNumber(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;
}

/**Script by hscripts.com**/
function isAlphanumeric(alphane) {
	var numaric = alphane;
	for (var j=0; j<numaric.length; j++) {
        var alphaa = numaric.charAt(j);
        var hh = alphaa.charCodeAt(0);
        if((hh > 47 && hh<59) || (hh > 64 && hh<91) || (hh > 96 && hh<123)) {
            //validate ok
        } else {
            return false;
        }
    }
    return true;
}
<!-- Script by hscripts.com -->

//format: yyyy/MM/dd
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 || isNumber(stripCharsInBag(dtStr, dtCh))==false){
		return false;
	}
    return true;
}

function trim(s) {
    return s.replace( /^\s*/, "" ).replace( /\s*$/, "" );
}

function isLength(argvalue, len) {
    if (argvalue.length == len) {
        return true;
    } else {
        return false;
    }
}

function isLengthRange(argvalue, startLen, endLen) {
    if (argvalue.length >= startLen && argvalue.length <= endLen) {
        return true;
    } else {
        return false;
    }
}

function isEmpty(argvalue) {
    argvalue = trim(argvalue);
    if (argvalue.length == 0) {
        return true;
    } else {
        return false;
    }
}
/*********************************public method for deveploer used end*********************************/

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
}