function validateEmail(value) {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(value)){
return value
} else {
alert('The Email Address is not valid.');
return "";
}
}

function trim( str ) {
var resultStr = "";
resultStr = TrimLeft(str);
resultStr = TrimRight(resultStr);
return resultStr;
}

function TrimLeft( str ) {
var resultStr = "";
var i = len = 0;
if (str+"" == "undefined" || str == null)    
return "";
str += "";

if (str.length == 0) 
resultStr = "";
else {    
len = str.length;
while ((i <= len) && (str.charAt(i) == " "))
i++;
resultStr = str.substring(i, len);
}
return resultStr;
}

function TrimRight( str ) {
var resultStr = "";
var i = 0;
if (str+"" == "undefined" || str == null)    
return "";
str += "";
if (str.length == 0) 
resultStr = "";
else {
i = str.length - 1;
while ((i >= 0) && (str.charAt(i) == " "))
i--;
resultStr = str.substring(0, i + 1);
}

return resultStr; 
}

function validate(form){

if (trim(document.getElementById("first_name").value) == "" || trim(document.getElementById("first_name").value) == "First Name")
{ alert("Please, fill the First Name Field"); document.getElementById("first_name").focus(); return; }

if (trim(document.getElementById("last_name").value) == "" || trim(document.getElementById("last_name").value) == "Last Name")
{ alert("Please, fill the Last Name Field"); document.getElementById("last_name").focus(); return; }

if (trim(document.getElementById("address").value) == "" || trim(document.getElementById("address").value) == "Address")
{ alert("Please, fill the Address Field"); document.getElementById("address").focus(); return; }

if (trim(document.getElementById("city").value) == "" || trim(document.getElementById("city").value) == "City")
{ alert("Please, fill the City Field"); document.getElementById("city").focus(); return; }

if (trim(document.getElementById("state").value) == "" || trim(document.getElementById("state").value) == "State")
{ alert("Please, fill the State Field"); document.getElementById("state").focus(); return; }

if (trim(document.getElementById("zip_code").value) == "" || trim(document.getElementById("zip_code").value) == "Zip Code")
{ alert("Please, fill the Zip Code Field"); document.getElementById("zip_code").focus(); return; }

if (trim(document.getElementById("phone_num").value) == "" || trim(document.getElementById("phone_num").value) == "Phone Number")
{ alert("Please, fill the Phone Field"); document.getElementById("phone_num").focus(); return; }

if (trim(document.getElementById("comments").value) == "" || trim(document.getElementById("comments").value) == "Comments")
{ alert("Please, fill the Comments Field"); document.getElementById("comments").focus(); return; }

var mail = trim(document.getElementById("email_add").value);
mail = validateEmail(trim(document.getElementById("email_add").value));
document.getElementById("email_add").value = mail;
if (mail == "")
{document.getElementById("email_add").focus(); return; }

var sometext=trim(document.getElementById("seq_ques").value);
var casechanged=sometext.toLowerCase();
var defaulttext="Is Fire Hot or Cold? Your answer proves you're a human";
defaulttext=defaulttext.toLowerCase();
if (casechanged == defaulttext)
{ alert("Please, fill the Security Question"); document.getElementById("seq_ques").focus(); return false; }
else
if (casechanged != "hot")
{ alert("Please, Answer the correct Security Question"); document.getElementById("seq_ques").focus(); return false; }
else
{document.getElementById("mainform").submit();return true;}
}