//__________________________________________________________
// 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 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){
		   alert("Your email address is incorrect.")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Your email address is incorrect.")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Your email address is incorrect.")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Your email address is incorrect.")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Your email address is incorrect.")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Your email address is incorrect.")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Your email address is incorrect.")
		    return false
		 }

 		 return true					
	}
//__________________________________________________________
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);
}
//__________________________________________________________

function ValidateForm(){
	var emailID=document.form1.emailaddy;
	var Phone=document.form1.phone;
	var Mobile=document.form1.mobile;
	var websitequery=document.form1.websitequery;
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Your email address is incorrect.")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	
	if ((!Phone.value == null) || (!Phone.value =="")){
	  if (checkInternationalPhone(Phone.value)==false){
		  alert("Please enter a valid phone #.");
		  Phone.value="";
		  Phone.focus();
		  return false;
	  }
    }
	
	if ((!Mobile.value == null) || (!Mobile.value =="")){
	  if (checkInternationalPhone(Mobile.value)==false){
		  alert("Please enter a valid mobile phone #.")
		  Mobile.value="";
		  Mobile.focus();
		  return false;
	  }
    }
	
	if ((websitequery.value == null) || (websitequery.value == "")){
		alert("Please enter your query into the box supplied.");
		websitequery.value="";
		websitequery.focus();
		return false;
	}

	return true
 }
//__________________________________________________________