var digits = "0123456789";
var phoneNumberDelimiters = "()- ";
var validWorldPhoneChars = phoneNumberDelimiters + "+";
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    for (i = 0; i < s.length; i++)
    {   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}
function validate()
{
	 var fm=document.frm;
	 if(fm.name.value=='')
	 {
		alert("Please Enter the Name");
		fm.name.focus();
		return false;
	 }
	 if (checkInternationalPhone(fm.phone.value)==false)
	 {
		alert("Please Enter a Valid Phone Number")
		fm.phone.focus();
		return false;
	 }
	 if(fm.email.value=='')
	 {
		alert("Please Enter the Email");
		fm.email.focus();
		return false; 
	 }
	 else
	 {
	 	  str=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
		  if (!(str.test(fm.email.value))) 
		  { 
			 alert("Please enter a valid email address");
		   	 fm.email.focus();
		     return false;
		  }
     }
	 if(fm.country.value==-1)
	 {
		alert("Please Select the Country");
		fm.country.focus();
		return false;
	 }
	 if(fm.subject.value=='')
	 {
		alert("Please Enter the Subject");
		fm.subject.focus();
		return false;
	 }
	 if(fm.details.value=='')
	 {
		alert("Please Enter the Details");
		fm.details.focus();
		return false;
	 }
}