// JavaScript Document

var err_bg_color='\#CC0000';
var ok_bg_color='\#515151';
function validate_phone_number(e){
	var error = "";
    var stripped = e.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (e.value == "") {
        error = "Please enter a " + e.name + "\n";
        e.style.background = err_bg_color;
    } else if (isNaN(stripped)) {
        error = "The phone number contains illegal characters.\n";
        e.style.background = err_bg_color;
    } else if (!(stripped.length == 10)) {
    	if (stripped.length > 10){
        	error = "The phone number has too many characters.\n";
        	e.style.background = err_bg_color;
        }
        else{
        	error = "The phone number needs to have 10 characters. Have you entered your area code?"
        	e.style.background= err_bg_color;
			}
    }else
		e.style.background = ok_bg_color;
	
    return error;
}


function validate_text(e){
	var error = "";
	if (e.value == null || e.value == e.title){
		e.style.background = err_bg_color;
		error = "Please specify " + e.name + "\n";
	}else
		e.style.background = ok_bg_color;
	
	return error;	
}


function validate_number(e){
	var error = "";
	var num = e.value;

	if (num == "" || isNaN(parseInt(num))){
		e.style.background = err_bg_color;
		error = "Please enter a valid number for " + e.name + "\n";
	}else
		e.style.background = ok_bg_color;
		
	return error;
	
}

function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}

function validate_email(e){
	var error="";
    var te = trim(e.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\<\>\(\)\,\;\:\\\"\[\]]/ ;
   
    if (e.value == "") {
        e.style.background = err_bg_color;
        error = "Please enter your email address.\n";
    } else if (!emailFilter.test(te)) {              //test email for illegal characters
        e.style.background = err_bg_color;
        error = "Please enter a valid email address.\n";
    } else if (e.value.match(illegalChars)) {
        e.style.background = err_bg_color;
        error = "The email address contains illegal characters.\n";
    } else {
		e.style.background = ok_bg_color;
	}
    return error;

}

function validate_checkbox(e){
	var num_cb = e.length;
	var count = 0;
	var error = "";
	for ( var i = 0 ; i < num_cb; i++){
		if (e[i].checked)
			count = count + 1;
	}
	
	if (count == 0)
		error = "Please tell us at least one of your " + e[0].name + "\n";
	return error;
	
}

function validate_dropdown(e){
	var error = "";
	if (e.selectedIndex == 0){
		error = "Please select a " + e.name + "\n";
		e.style.background = err_bg_color;
	}
	
	return error;
}