/*******************************************************************************
Program Name          :   inc_javascript.js
Purpose                   :   Client side form validation
Author                    :   MB.Ashokkumar   
Date of Creation         :    10/07/2003
Last Modifier            :   MB.Ashokkumar
Last Modified Date       :   31/07/2003 
Called By                :   All displayfiles
Calls                       :   NA
Parameters Received    :   NA
Tables Used             :   NA
********************************************************************************/

/*
Function Name      :   getFocus
Purpose               :   for Locating the cursor position in Form Loading time.
Parameter received   :   sFrmName,sFiledName
Return Value         :   boolean
*/
function getfocus(sFrmName, sFiledName)
{
   var temp = sFrmName + "." + sFiledName +  "." + "focus();";
   eval(temp);   
}

/*
Function Name      :   checkEmptiness
Purpose            :   For checking emptiness of given value 
Parameter received   :   val
Return Value      :   Boolean
*/
function checkEmptiness(val)
{
   RegExp1 = /^[\s]+$/g 
   RegExp2 = /^$/g
   if (RegExp1.test(val) || RegExp2.test(val))
   {
      return true;
   }
   return false;
}

/*
Function Name      :   validateSpace
Purpose            :   To check the space in the field values.
Parameter received   :   sValue
Return Value      :   boolean
*/
function validateSpace(sValue)
{
   var iCount=0;
   for(;iCount<sValue.length;iCount++)
   {
      if(sValue.charAt(iCount)==' ')
         return false;
   }
   return true;
}

/*
Function Name      :   trimvalue
Purpose            :   Removes leading and trailing spaces.
Parameter received   :   strValue
Return Value      :   boolean
*/
function trimvalue( strValue )
{
 var objRegExp = /^(\s*)$/;

    //check for all spaces
    if(objRegExp.test(strValue))
   {
       strValue = strValue.replace(objRegExp, '');
       if( strValue.length == 0)
          return strValue;
    }
    
   //check for leading & trailing spaces
   objRegExp = /^(\s*)([\W\w]*)(\b\s*$)/;
   if(objRegExp.test(strValue)) {
       //remove leading and trailing whitespace characters
       strValue = strValue.replace(objRegExp,'$2');
    }
  return strValue;
}

/*
Function Name      :   validateSplChar
Purpose            :   To check for special characters at input field.
Parameter received   :   sFrmName, sFieldName
Return Value      :   boolean
*/
function validateAlphaNumeric(sValue)
{
   var sAlphaNumeric = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
   for(var iTemp=0;iTemp<sValue.length;iTemp++)
   {
      if(sAlphaNumeric.indexOf(sValue.charAt(iTemp)) == -1 && sValue.charAt(iTemp)!=' ')
         return false;
   }
   return true;
}   

/*
Function Name      :   validateAlphabet
Purpose            :   To check for special characters at input field.
Parameter received   :   sFrmName, sFieldName
Return Value      :   boolean
*/
function validateAlphabet(sValue)
{
   var sAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
   for(var iTemp=0;iTemp<sValue.length;iTemp++)
   {
      if(sAlphabet.indexOf(sValue.charAt(iTemp))==-1 && sValue.charAt(iTemp)!=' ')
         return false;
   }
   return true;
}   

function validateNumeric(sValue)
{
   var sAlphabet = "0123456789.";
   for(var iTemp=0;iTemp<sValue.length;iTemp++)
   {
      if(sAlphabet.indexOf(sValue.charAt(iTemp))==-1 && sValue.charAt(iTemp)!=' ')
         return false;
   }
   return true;
}

/*
Function Name       : validateEMail
Purpose             : To check the email address format is valid or not
Parameters received : sValue
Return Value        : boolean
*/
function validateEMail(sValue){
     var sAlphaNumeric = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-@.";
     for(var iTemp=0;iTemp<sValue.length;iTemp++){
          if(sAlphaNumeric.indexOf(sValue.charAt(iTemp)) == -1)
               return false;
     }
     if(sValue.indexOf('@') == -1 || sValue.indexOf('.') == -1 ){
          return false;
     }
     if(sValue.indexOf('@') == 0 || sValue.indexOf('.') == 0 ){
          return false;
     }
     return true;
}

/*
Function Name      :   displayMessage
Purpose            :   To display error message through alert box.
Parameter received   :   frmObject, sMessage, sErrorType
Return Value      :   NA
*/
function displayMessage(sFrmObject, sErrorMessage)
{
   alert(sErrorMessage);
   eval(sFrmObject+".focus()");
   eval(sFrmObject+".select()");
}


/* script ends */
// 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){
		alert("The date format should be : mm/dd/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
}