/* 
    This is the source code for the validation function. 
    Add the following code just after the </HEAD> in the files where the 
    generalised validation functionality is required. 
    <SCRIPT language="JavaScript1.2" src="gen_validation.js"></SCRIPT> 
*/ 

    /* 
    *   File : gen_validation.js 
    *   Author : Prasanth M J 
    *   
    *   CreativeProgrammers.com - 
	*	Turn your Programming Expertise into Achievements!
    *   Visit http://www.creativeprogrammers.com 
    *     
    *   Email : prasanth@creativeprogrammers.com
    */ 
//---------------------------------EMail Check ------------------------------------ 

/*  checks the validity of an email address entered 
*   returns true or false 
*   
*/ 

function validateEmail(email)  //if invalid email false is returned
{
// a very simple email validation checking.
// you can add more complex email checking if it helps 
    var splitted = email.match("^(.+)@(.+)$");
    if(splitted == null) return false;
    if(splitted[1] != null )
    {
      var regexp_user=/^\"?[\w-_\.]*\"?$/;
      if(splitted[1].match(regexp_user) == null) return false;
    }
    if(splitted[2] != null)
    {
      var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
      if(splitted[2].match(regexp_domain) == null) 
      {
	    var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	    if(splitted[2].match(regexp_ip) == null) return false;
      }// if

      return true;
    }

 return false;
}

function validateSpecialCharacters(inputString){
    var spchar, getChar, SpecialChar;
	spchar="`()(\\~!@^&#*+\"|%:=,<> ";
	getChar='Empty';
	SpecialChar='No';
	var spchars =" ` ( )  \\ ~ ! @ ^ & # * + \" | : =  , < > ";
	for(var i=0; i<inputString.length;i++){
		for(var j=0; j<spchar.length;j++){
			if(inputString.charAt(i)== spchar.charAt(j)){
				SpecialChar='Yes';
				break;
			}else{
				if(inputString.charAt(i)!=' ')
				getChar='Normal';
			}
		}
	}
	if(SpecialChar == 'Yes'){
	    return false;
   	}else if(SpecialChar == 'No'){
		return true;
	}
}

function validateName(inputString){
    var spchar, getChar, SpecialChar;
	spchar="`()(\\~!@^#*+\"|%:=,<>";
	getChar='Empty';
	SpecialChar='No';
	for(var i=0; i<inputString.length;i++){
		for(var j=0; j<spchar.length;j++){
			if(inputString.charAt(i)== spchar.charAt(j)){
				SpecialChar='Yes';
				break;
			}else{
				if(inputString.charAt(i)!=' ')
				getChar='Normal';
			}
		}
	}
	if(SpecialChar == 'Yes'){
	    return false;
   	}else if(SpecialChar == 'No'){
		return true;
	}
}


/* function validateData 
*  Checks each field in a form 
*  Called from validateForm function 
*/ 
function validateData(strValidateStr,objValue,strError) 
{
    var epos = strValidateStr.search("="); 
    var  command  = ""; 
    var  cmdvalue = ""; 
    if(epos >= 0) 
    {
     command  = strValidateStr.substring(0,epos);
     cmdvalue = strValidateStr.substr(epos+1); 
    } 
    else 
    {
     command = strValidateStr;
    } 

    switch(command) 
    { 
        case "req": 
        case "required": 
         { 
           if(eval(objValue.value.length) == 0) 
           { 
              if(!strError || strError.length ==0) 
              { 
                strError = objValue.name + " : Required Field"; 
              }//if 
              alert(strError); 
              return false; 
           }//if 
           break;             
         }//case required 
        case "maxlength": 
        case "maxlen": 
          {
             if(eval(objValue.value.length) >  eval(cmdvalue)) 
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : "+cmdvalue+" characters maximum "; 
               }//if 
               alert(strError );//+ "\n[Current length = " + objValue.value.length + " ]"); 
               return false; 
             }//if 
             break; 
          }//case maxlen 
        case "minlength": 
        case "minlen": 
           { 
             if(eval(objValue.value.length) <  eval(cmdvalue)) 
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : " + cmdvalue + " characters minimum  "; 
               }//if               
               alert(strError);// + "\n[Current length = " + objValue.value.length + " ]"); 
               return false;                 
             }//if 
             break; 
            }//case minlen 
        case "alnum": 
        case "alphanumeric": 
           { 
              //var charpos = objValue.value.search("[^A-Za-z0-9_ ]");
              var charpos = objValue.value.search("[^A-Za-z0-9]");
              if(objValue.value.length > 0 &&  charpos >= 0)
              { 
               if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+": Only alpha-numeric characters allowed "; 
                }//if 
                alert(strError);// + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 
              break; 
           }//case alphanumeric 

		case "plusallow": 
        { 
              var charpos = objValue.value.search("[^0-9+ -]"); 
              if(objValue.value.length > 0 &&  charpos >= 0) 
              { 
               if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+":Only numbers or + is allowed "; 
                }//if 
                alert(strError);// + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 
              break; 
           }//case alphanumeric 
        case "num": 
        case "numeric": 
           {
              var charpos = objValue.value.search("[^0-9]");
              if(objValue.value.length > 0 &&  charpos >= 0) 
              { 
                if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+": Only digits allowed "; 
                }//if               
                alert(strError);// + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 
              break;               
           }//numeric
		case "float": 
        case "floating": 
           { 
              var charpos = objValue.value.search("[^0-9.]"); 
              if(objValue.value.length > 0 &&  charpos >= 0) 
              { 
                if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+": Only Floating numbers allowed "; 
                }//if               
                alert(strError);// + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 
			  break;               
           }//numeric   
        case "alphabetic": 
        case "alpha": 
           { 
              var charpos = objValue.value.search("[^A-Za-z ]");
              if(objValue.value.length > 0 &&  charpos >= 0) 
              { 
                  if(!strError || strError.length ==0) 
                { 
                  strError = objValue.name+": Only alphabetic characters allowed "; 
                }//if                             
                alert(strError);// + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
              }//if 
              break; 
           }//alpha 
        case "email": 
          { 
			   if(objValue.value.length==0)break;
			   if(!validateEmail(objValue.value)){
                 if(!strError || strError.length ==0){
                    strError = objValue.name+": Enter a valid Email address "; 
                 }//if                                               
                 alert(strError); 
                 return false; 
               }//if 
           break;
           
          }//case email
        case "specialCh":
          {
			   if(objValue.value.length==0)break;
			   if(!validateSpecialCharacters(objValue.value)){
                 if(!strError || strError.length ==0){
                    strError = objValue.name+": Enter a valid input string ";
                 }//if
                 alert(strError);
                 return false;
               }//if
           break;

          }//specialCh
         case "validateName":
          {
			   if(objValue.value.length==0)break;
			   if(!validateName(objValue.value)){
                 if(!strError || strError.length ==0){
                    strError = objValue.name+": Enter a valid input string ";
                 }//if
                 alert(strError);
                 return false;
               }//if
           break;

          }//validate name
        
        case "lt": 
        case "lessthan": 
         { 
            if(isNaN(objValue.value)) 
            { 
              alert(objValue.name+": Should be a number "); 
              return false; 
            }//if 
            if(eval(objValue.value) >=  eval(cmdvalue)) 
            { 
              if(!strError || strError.length ==0) 
              { 
                strError = objValue.name + " : value should be less than "+ cmdvalue; 
              }//if               
              alert(strError); 
              return false;                 
             }//if             
            break; 
         }//case lessthan 
        case "gt": 
        case "greaterthan": 
         { 
            if(isNaN(objValue.value)) 
            { 
              alert(objValue.name+": Should be a number "); 
              return false; 
            }//if 
             if(eval(objValue.value) <=  eval(cmdvalue)) 
             { 
               if(!strError || strError.length ==0) 
               { 
                 strError = objValue.name + " : value should be greater than "+ cmdvalue; 
               }//if               
               alert(strError); 
               return false;                 
             }//if             
            break; 
         }//case greaterthan 
        case "regexp": 
         { 
            if(!objValue.value.match(cmdvalue)) 
            { 
              if(!strError || strError.length ==0) 
              { 
                strError = objValue.name+": Invalid characters found "; 
              }//if                                                               
              alert(strError); 
              return false;                   
            }//if 
           break; 
         }//case regexp 
        case "dontselect": 
         { 
            /*if(objValue.selectedIndex == null) 
            { 
              alert("BUG: dontselect command for non-select Item"); 
              return false; 
            } */
            if(objValue.selectedIndex == eval(cmdvalue)) 
            { 
             if(!strError || strError.length ==0) 
              { 
              strError = objValue.name+": Please Select one option "; 
              }//if                                                               
              alert(strError); 
              return false;                                   
             } 
             break; 
         }//case dontselect 
    }//switch 
    return true; 
} 

/* 
* function validateForm 
* the function that can be used to validate any form 
* returns false if the validation fails; true if success 
* arguments : 
*   objFrm     : the form object 
*   arrObjDesc : an array of objects describing the validations to conduct on each 
*        input item. 
*          The array should consist of one object per input item in the order the input 
*          elements are present in the form. Each object consist of zero or more validation 
*          objects. Each of these validation object is a pair consisting of the validation 
*          descriptor string and an optional Error message. 
*/ 

function validateForm(objFrm,arrObjDesc) 
{
 for(var itrobj=0; itrobj < arrObjDesc.length; itrobj++) 
 {

   if(objFrm.elements.length <= itrobj) 
   {
        alert("BUG: Obj descriptor for a non existent form element");
        return false; 
   }//if 
   for(var itrdesc=0; itrdesc < arrObjDesc[itrobj].length ;itrdesc++) 
   {

      if(validateData(arrObjDesc[itrobj][itrdesc][0], 
                 objFrm[itrobj],arrObjDesc[itrobj][itrdesc][1]) == false) 
       { 
	        objFrm[itrobj].focus();

         return false; 
       }//if 
   }//for 
 }//for
} 


function checkAllForNull(formObj){
	flag=false;
	trimAll(formObj);
	for(i=0;i<formObj.elements.length;i++){

		if(formObj.elements[i].name=='combine')
			continue;

		if((formObj.elements[i].type=='text' || formObj.elements[i].type=='textarea') && formObj.elements[i].value!=''){
			flag=true;
			break;
		}
		if(formObj.elements[i].type=='select-one' && formObj.elements[i].selectedIndex!=0){
			flag=true;
			break;
		}

		 if(formObj.elements[i].type=='checkbox' && formObj.elements[i].checked){
			 flag=true;
	         break;
		 }
	}

	if(!flag)
		alert("Please choose/fill atleast one field");

	return flag;
}

function checkDate(startDate,endDate){
   var flag = false;
   if(startDate=="" && endDate==""){
      alert("Please enter start date and end date");
      return flag;
   }else if(startDate == ""){
      alert("Please enter start date");
      return flag;
   }else if(endDate == ""){
      alert("Please enter end date");
      return flag;
   }else if(startDate.length==10 && endDate.length==10){
      var sDay = startDate.substring(0,2);
      var sMonth = startDate.substring(3,5);
      var sYear = startDate.substring(6);
      var eDay = endDate.substring(0,2);
      var eMonth = endDate.substring(3,5);
      var eYear = endDate.substring(6);
      if(eYear < sYear){
         alert("end date can't be less than start date ");
         return flag;
      }else if((eYear == sYear) &&(eMonth < sMonth)){
         alert("end date can't be less than start date ");
         return flag;
      }else if((eYear == sYear) && (eMonth == sMonth) && (eDay < sDay)){
         alert("end date can't be less than start date ");
         return flag;
      }else{
        flag = true;
     }
  }
    return flag;
}

// ================= Javascript validation for valid Mobile Number ===============================

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

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 trim(s)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not a whitespace, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (c != " ") returnString += c;
    }
    return returnString;
}
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++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
	var bracket=3
	strPhone=trim(strPhone)
	if(strPhone.indexOf("+")>1) return false
	if(strPhone.indexOf("-")!=-1)bracket=bracket+1
	if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
	var brchr=strPhone.indexOf("(")
	if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
	if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}