// 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 = 8;

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 true
if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return true
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

	function check()
	{
		var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
		var e=document.quickquery.ab.value
		var returnval=emailfilter.test(e)
		
		if (document.quickquery.a.value=="")
			{
				alert ("Please enter name");
				document.quickquery.a.focus()
				return false;
			}
		else if (returnval==false)
			{
				alert("Please enter a valid email address.")
				document.quickquery.ab.select()
				return false;
			}
		else if (document.quickquery.phon.value=="")
			{
				alert ("Please enter phone number");
				document.quickquery.phon.focus()
				return false;
			}
			else if(checkInternationalPhone(document.quickquery.phon.value)==false) 
			{
				alert ("Please enter a valid phone number");
				document.quickquery.phon.focus()
				return false;
			}
			else if(document.quickquery.query.value=="")
			{
				alert("Please Enter your query")
				document.quickquery.query.focus()
				return false;
			}
			
	}
	
	function validateform()
	{
		var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
		var e=document.request.aa.value
		var returnval=emailfilter.test(e)
		
		if (document.request.fname.value=="")
			{
				alert ("Please enter name");
				document.request.fname.focus()
				return false;
			}
		else if(document.request.lname.value=="")
			{
				alert("Please enter last name")
				document.request.lname.focus()
				return false;
			}
		else if (returnval==false)
			{
				alert("Please enter a valid email address.")
				document.request.aa.select()
				return false;
			}
			
		
	}
	
	function validcontact()
	{
		var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
		var e=document.contact.aa.value
		var returnval=emailfilter.test(e)
		
		if (document.contact.cname.value=="")
			{
				alert ("Please enter name");
				document.contact.cname.focus()
				return false;
			}
		
		else if (returnval==false)
			{
				alert("Please enter a valid email address.")
				document.contact.aa.select()
				return false;
			}
		else if(document.contact.comment.value=="")
			{
				alert("Please enter your comment")
				document.contact.comment.focus()
				return false;
			}
			
		
	}