// performs form verification, invoked from the onSubmit() event handler. 
// Loop through the elements of the form, looking for all 
// text and textarea elements that don't have an "optional" property
// defined. Then, check for fields that are empty and make a list of them.
// Put together error messages for invalid fields.
// Writen by Scott Winterbourne June 20th, 2005.

// 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 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 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 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 checkInternationalPhone(strPhone){
var bracket=3
strPhone=trim(strPhone)
if(strPhone.indexOf("+")>1) return false
if(strPhone.indexOf("(")!=-1 && strPhone.indexOf(")")==-1)return false
if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}




function verify(fields)
{
    var msg;
    var empty_fields = "";
    var errors = "";
	var thePosition;
	var email;
   
	
    for(var i = 0; i < fields.length; i++) 
	{
        var formver = fields.elements[i];
				
		//thePosition=formver.name.indexOf("_");
		//if(-1==thePosition)
		//{
			//thePosition=formver.name.length;
		//}
			
//////////////////////////////////////////////////////////////////////////////////////////////////		
		//Checks for blank required fields
        if (formver.id== 'text') //checks for required fields
		{
            //check if the field is empty
            if ((formver.value == null) || (formver.value == "") || (formver.value == " name")) 
			{
                empty_fields += "- " + formver.name + " : Please enter your " + formver.name;
                continue;
            }
        }
////////////////////////////////////////////////////////////////////////////////////////////////////	
		// check to see if email address field is of valid syntax 
    if (formver.id == 'email')//Checks for an email field
	{
	  substremail = formver.value.split("@") 
	  if (formver.value == "")
	  {
		//   empty_fields += "\n          " + formver.name
        //   continue;
	  }
      else if (substremail.length > 1)//makes sure the email address has an @ symbol   
      {   
          index = substremail[1].indexOf(".") 
		     
           if (index == -1)   //makes sure there is a dot (.) in the address
           { 
		    
           errors += "- Email : Please enter a valid e-mail address\n";               
		   continue; 
           }   
      } 
  
      else 
	  	{  
           errors += "- Email : Please enter a valid e-mail address\n";     
           continue;  
      	}
	  }
	  
	if (formver.id == 'number')//checks for a number field
	 {	 
	 if (checkInternationalPhone(formver.value)==false)//checks for a non numeric value
		{			
			errors += "- Phone : Please enter a valid phone number (xxx) xxx-xxxx\n";
			continue;	
			
		}
		//if (formver.value.length != formverid[1])//checks to see if the value length matches the perameters
		//	{
		//	errors = "Please enter a 5 digit zip code";
		//	continue;
		//	}	
		
	}
	 
}


/////////////////////////////////////////////////////////////////////////////////////////////////////////	
    // if there were any errors, display the messages, and
    // return false to prevent the form from being submitted. 
    
	if (!empty_fields && !errors) return true;
    
	msg  = "Asbestos.com\n"
	msg += "______________________________________________________\n\n"
    msg += "The form was not submitted because of the following error(s).\n";
    msg += "Please correct these error(s) and re-submit.\n";
    msg += "______________________________________________________\n\n"
    
	if (empty_fields) 
	{
        msg += empty_fields + "\n";
    }
    	msg += errors;
    	alert(msg);
    	return false;  
	
}
////////////////////////////////////////////////////////////////////////////////////////////////////
// this function is called to check if a value is numberic
function IsNumeric(sText)
{

	   var ValidChars = "0123456789.";
	   var IsNumber=true;
	   var Char;
	
	 
	   for (i = 0; i < sText.length && IsNumber == true; i++) 
		  { 
		  Char = sText.charAt(i); 
		  if (ValidChars.indexOf(Char) == -1) 
			 {
			 IsNumber = false;
			 }
		  }
	   return IsNumber;
}