function validate_request_info()
{

var name=document.request_info.first_name.value;
var email=document.request_info.Email.value;
var phone=document.request_info.Phone.value;

if (name=="")
{
alert('Please Enter your First Name');
document.request_info.first_name.focus();
return false;
}
if (email=="")
{
alert('Please Enter your Email Address');
document.request_info.Email.focus();
return false;
}
var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.request_info.Email.value;
   if(reg.test(address) == false) {
      alert('Please enter Valid Email Address');
	  document.request_info.Email.value="";
	  document.request_info.Email.focus();
      return false;
}
if (phone=="")
{
alert('Please Enter your Phone Number');
document.request_info.Phone.focus();
return false;
}
 if (checkInternationalPhone(document.request_info.Phone.value)==false){
		alert("Please Enter a Valid Phone Number")
		document.request_info.Phone.value="";
		document.request_info.Phone.focus();
		return false;
	}
if (checkinterests(document.request_info.interests)==false)
{
alert('Please Select Your Interests');
return false;
}

return true;

}
function checkinterests(val)
{
var i=0;
for(i=0;i<val.length; i++)
if(val[i].checked)
{
	return true;
	break;
}
else return false;
}
var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
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);
}