function validate()
{


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 = 4;

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);
}



  var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i; 
  
 
 
  with(window.document.dallas)
  {
    if(fname.value=='First Name')
    {
      alert("Please enter your first name.");
      fname.value="";
      fname.focus();
      return false;
    }
     if(fname.value=='')
    {
      alert("Please enter your first name.");
      fname.value="";
      fname.focus();
      return false;
    }
       
    if(lname.value=='Last Name')
    {
      alert("Please enter your last name.");
      lname.value="";
      lname.focus();
      return false;
    }
      if(lname.value=='')
    {
      alert("Please enter your last name.");
      lname.value="";
      lname.focus();
      return false;
    }
    
    	if ((cno.value=='Cell Number')){
		alert("Please enter your cell number.");
		cno.value="";
		cno.focus();
		return false;
	}
	if (checkInternationalPhone(cno.value)==false){
		alert("Please enter valid cell number.")
		cno.value="";
		cno.focus();
		return false;
	}
	 	if ((cno.value=='')){
		alert("Please enter your cell number.");
		cno.value="";
		cno.focus();
		return false;
	}
	if (checkInternationalPhone(cno.value)==false){
		alert("Please enter valid cell number.")
		cno.value="";
		cno.focus();
		return false;
	}
    
    
    
    
    if(email.value=='Email Address')
    {
      alert("Please enter your email-id.");
      email.value="";
      email.focus();
      return false;
    }
    else if(email.value!='')
    {
      if(filter.test(email.value)==false)
      {
        alert("Please enter your valid email-id.");
        email.value="";
        email.focus();
        return false; 
      }
    }
      if(email.value=='')
    {
      alert("Please enter your email-id.");
      email.value="";
      email.focus();
      return false;
    }
    else if(email.value!='')
    {
      if(filter.test(email.value)==false)
      {
        alert("Please enter your valid email-id.");
        email.value="";
        email.focus();
        return false; 
      }
    }  
    
 
  }
  
  return true;
}
function removedata()
{
if(document.getElementById("a").value=="First Name")
{
document.getElementById("a").value="";
}
//window.document.Username.value='';

}
function removedata1()
{
if(document.getElementById("b").value=="Last Name")
{
document.getElementById("b").value="";
}
//window.document.Username.value='';

}
function removedata2()
{
if(document.getElementById("c").value=="Cell Number")
{
document.getElementById("c").value="";
}
//window.document.Username.value='';

}
function removedata3()
{
if(document.getElementById("d").value=="Email Address")
{
document.getElementById("d").value="";
}
//window.document.Username.value='';

}

function AllField()
{
    if(document.getElementById("a").value=="")
      document.getElementById("a").value="First Name";

    if(document.getElementById("b").value=="")
    document.getElementById("b").value="Last Name";
    
    if(document.getElementById("c").value=="")
    document.getElementById("c").value="Cell Number";
    
    if(document.getElementById("d").value=="")
    document.getElementById("d").value="Email Address";
    
}