// 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);
}

    /*Email Validation*/
    function echeck(str)
    {
	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

	 return true					
	}


/*
* - Validates both email address and telephone numbers - one after the other.
* - Will not validate telephone number until satisfied that email is valid.
*/
function validateForm()
{    
    var cEmployee = true;
    var cName = true;
    var cEmail = true;
    var cTele = true;
    var cMessage = true;
        	
    var employee = document.forms['formContact'].companyEmployee;
    if ((employee.value==null)||(employee.value==""))
    {
	employee.value="--Please enter your name--";
	employee.style.color = '#FF0000';
	cEmployee = false;
    }
   
    var name = document.forms['formContact'].companyName;
    if ((name.value==null)||(name.value==""))
    {
	name.value="--Please enter your company name--";
	name.style.color = '#FF0000';
	cName = false;
    }
	
    var emailID = document.forms['formContact'].companyEmail;    
    if ((emailID.value==null)||(emailID.value==""))
    {
	emailID.value = "--Please enter a valid email address--";
	emailID.style.color = '#FF0000';
	cEmail = false;
    }
    else if(echeck(emailID.value)==false)
    {
	emailID.value = "--Please enter a valid email address--";
	emailID.style.color = '#FF0000';
	cEmail = false;
    }		

    var Phone = document.forms['formContact'].companyTele
    
    if ((Phone.value==null)||(Phone.value==""))
    {
	Phone.value = "--Please enter a valid telephone number--";
	Phone.style.color = '#FF0000';
	cTele = false;
    }
    else if (checkInternationalPhone(Phone.value)==false)
    {
	Phone.value = "--Please enter a valid telephone number--";
	Phone.style.color = '#FF0000';
	cTele = false;
    }         

    var message = document.forms['formContact'].companyMessage;
    if ((message.value==null)||(message.value==""))
    {
	message.value="--Please enter a message--";
	message.style.color = '#FF0000';
	cMessage = false;
    }
    
    var refer = document.forms['formContact'].companyRefer;
    if(refer.value=="--Please Select--")
	refer.selectedIndex = 7;

    if((cEmployee == true) && (cName == true) && (cEmail == true) && (cTele == true) && (cMessage == true))
        return true;
    else
        return false;
}

function blank(elementName)
{
    var el = document.forms['formContact'].elements[elementName];
    el.style.color = '#666666';
    el.value = "";

    return true;
}