// JavaScript Document
function isValid(form1)
{
	var form = document.form1;
	if(form.first_name.value=="")
	{
		alert("Please enter First Name");
		form.first_name.focus();
		return false;
	}
	if(form.last_name.value=="")
	{
		alert("Please enter Last Name");
		form.last_name.focus();
		return false;
	}
	if(form.login_id.value=="")
	{
		alert("Please enter User Name");
		form.login_id.focus();
		return false;
	}else{
			if(!allselectedChars(form.login_id.value))
			{
			  alert("This field should not have special character like (')");
			  form.login_id.focus();
			  return false;
			}
	}
	if(form.password.value=="")
	{
		alert("Please enter Password");
		form.password.focus();
		return false;
	}else{
			if(!allselectedChars(form.password.value))
			{
			  alert("This field should not have special character like (')");
			  form.password.focus();
			  return false;
			}
	}
	if(form.comp_name.value=="")
	{
		alert("Please enter Company Name");
		form.comp_name.focus();
		return false;
	}
	if(form.comp_addr.value=="")
	{
		alert("Please enter Company Address");
		form.comp_addr.focus();
		return false;
	}
	if(form.email.value=="")
	{
		alert("Please enter Company Email");
		form.email.focus();
		return false;
	}
	else if (!isValidEmail(form.email.value))
	{
        alert("Please enter a valid Email address");
		form.email.focus();
        return false;
	}
	if(form.chat_id.value=="")
	{
		alert("Please enter Chat ID");
		form.chat_id.focus();
		return false;
	}
	if(!form.chat_im[0].checked && !form.chat_im[1].checked && !form.chat_im[2].checked && !form.chat_im[3].checked)
	{
		alert("Please select the option for ChatID");
		return false;
	}
	if(form.comp_size.value=="")
	{
		alert("Please enter company size");
		form.comp_size.focus();
		return false;
	}
	if(!form.extra_site[0].checked && !form.extra_site[1].checked)
	{
		alert('Please select the option for "Are You On...."');
		return false;
	}
	if(form.pri_business.value=="")
	{
		alert("Please enter Primary Business");
		form.pri_business.focus();
		return false;
	}
	
}

function isValidEmail(email, required)
{
	if (required==undefined) {   // if not specified, assume it's required
		required=true;
	}
	if (email==null) {
		if (required) {
			return false;
		}
		return true;
	}
	if (email.length==0) {  
		if (required) {
			return false;
		}
		return true;
	}
	if (! allValidChars(email)) {  // check to make sure all characters are valid
		return false;
	}
	if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
		return false;
	} else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
		return false;
	} else if (email.indexOf("@") == email.length) {  // @ must not be the last character
		return false;
	} else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
	} else if (email.indexOf(".") == email.length-1) {  // . must not be the last character
	return false;
	}
	return true;
}

function allValidChars(email) 
{
	var parsed = true;
	var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
	for (var i=0; i < email.length; i++) {
		var letter = email.charAt(i).toLowerCase();
		if (validchars.indexOf(letter) != -1)
		  continue;
		parsed = false;
		break;
	}
	return parsed;
}

function allselectedChars(text)
{
	var parsed = true;
	var validchars = "'";
	for (var i=0; i < text.length; i++) {
		var letter = text.charAt(i).toLowerCase();
		if (validchars.indexOf(letter) == -1)
		  continue;
		parsed = false;
		break;
		}
	return parsed;
}