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Javascript: Validation
//if the ext is invalid, display an alert and return false.
//if is valid returns true.
function ValidateExtImg(inputObj) {
var _validFileExtensions = [".jpg", ".jpeg", ".bmp", ".gif", ".png", ".pdf"];
var oInput = inputObj;
if (oInput.type == "file") {
var sFileName = oInput.value;
if (sFileName.length > 0) {
var blnValid = false;
for (var j = 0; j < _validFileExtensions.length; j++) {
var sCurExtension = _validFileExtensions[j];
if (sFileName.substr(sFileName.length - sCurExtension.length, sCurExtension.length).toLowerCase() == sCurExtension.toLowerCase()) {
blnValid = true;
break;
}
}
if (!blnValid) {
alert("Sorry, " + sFileName + " is invalid, allowed extensions are: " + _validFileExtensions.join(", "));
return false;
}
}
}
return true;
}
/**************************************
/* size file upload
/**************************************/
//return file size in bytes
function getFileSize( inputFile ) {
var files = inputFile.files;
if( !files ) {
//for IE
try {
var fs = new ActiveXObject( 'Scripting.FileSystemObject' );
var file = fs.getFile( inputFile.value );
return file.size;
} catch( ex ) {
return -1;
}
} else if( files.length > 0 ) {
//for rest of the world
return files[ 0 ].size;
}
}
//**********************************************************DATE******************************************************
/* DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/datevalidation.asp)
// Declaring valid date character, minimum year and maximum year*/
// example: ValidateDate(inputField)
// returns true if is ok else display alerts depending failure and returns false.
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 strDay=dtStr.substring(0,pos1);
var strMonth=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,10);
day=parseInt(strDay,10);
year=parseInt(strYr,10);
if (pos1==-1 || pos2==-1){
alert("The date format should be : dd/mm/yyyy");
return false;
}
if (strMonth.length<1 || month<1 || month>12){
alert("Please enter a valid month");
return false;
}
if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
alert("Please enter a valid day");
return false;
}
if (strYear.length != 4 || year===0 || year<minYear || year>maxYear){
alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear);
return false;
}
if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))===false){
alert("Please enter a valid date");
return false;
}
return true;
}
function ValidateDate(date_id){
var dt=document.getElementById(date_id.id);
if (isDate(dt.value)===false){
dt.focus();
return false;
}
return true;
}
//**********************************************************DATE***********************************************************************
function echeck(str) { //Email check function
var at="@";
var dot=".";
var lat=str.indexOf(at);
var lstr=str.length;
var ldot=str.indexOf(dot);
if (str.indexOf(at)==-1){
return false;
}
if (str.indexOf(at)==-1 || str.indexOf(at)===0 || str.indexOf(at)==lstr){
return false;
}
if (str.indexOf(dot)==-1 || str.indexOf(dot)===0 || str.indexOf(dot)==lstr){
return false;
}
if (str.indexOf(at,(lat+1))!=-1){
return false;
}
if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
return false;
}
if (str.indexOf(dot,(lat+2))==-1){
return false;
}
if (str.indexOf(" ")!=-1){
return false;
}
}
function emailVal(emailId)
{
if ((emailId.value===null)||(emailId.value==="")){
alert("You must enter your email.");
email.focus();
return false;
}
if (echeck(emailId.value)===false){
alert("There seems to be a problem with the email entered.");
emailId.focus();
return false;
}
}
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