function isValidEmail(str) {
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
 }

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 formcheck()
{
	
	var fname = document.getElementById("name").value;
	var company = document.getElementById("company").value;
	var email = document.getElementById("mail").value;
	var phone = document.getElementById("phone").value;
	var address = document.getElementById("address").value;
	var city = document.getElementById("city").value;
	var state = document.getElementById("state").value;
	var zip = document.getElementById("zipcode").value;
				
	
	if(fname==""){ alert ("Please Enter Name"); return false; }
	if(company==""){ alert ("Company filed shouldn't be blank"); return false; }
	if(email==""){ alert ("Please enter your registered email address"); return false; }
	if (!isValidEmail(email)){ alert("Invalid e-mail address! please re-enter."); return false; }
	if(phone==""){ alert ("Please Enter Valid Phone No."); return false; }
	if (!isInteger(phone)){ alert("Please Enter Numeric Valid phone No"); return false; }
	if(address==""){ alert ("Address field shouldn`t be blank"); return false; }
	if(city==""){ alert ("Please Enter city name"); return false; }
	if(state==""){ alert ("Please Enter State Name"); return false; }
	if(zip==""){ alert ("Please Enter Zip code"); return false; }
		
	
	return true;
}

function offer()
{
	var emailid = document.getElementById("email_id").value;
	var fname1 = document.getElementById("fname").value;

	if(emailid==""){ alert ("Please enter your registered email address"); return false; }
	if (!isValidEmail(emailid)){ alert("Invalid e-mail address! please re-enter."); return false; }
	if(fname1==""){ alert ("Please Enter Name"); return false; }
		
	return true;
}