function checkPassword (strng) {
var error = "";
if (strng == "")
 {
   error = "* Please provide password.\n";
 }
	return error;    
}    

function checkUsername (strng) {
var error = "";
if (strng == "")
 {
   error = "* Plesae provide a username.\n";
 }
return error;
}       

function checkCat (strng) {
var error = "";
if (strng == "")
 {
   error = "* Plesae provide a category name.\n";
 }
return error;
}       


function checkTitle (strng) {
var error = "";
if (strng == "")
 {
   error = "* Plesae provide a product title name.\n";
 }
return error;
}       

function checkDescription (strng) {
var error = "";
if (strng == "")
 {
   error = "* Please provide a product description.\n";
 }
return error;
}     

function checkPriceUs(strng){
var error = "";

    if (strng == "") {
   		error = "* Please provide a price for this product.\n";
	}else if (strng.search(/^\$?(\d{1,3},?(\d{3},?)*\d{3}(\.\d{1,3})?|\d{1,3}(\.\d{2})?)$/)== -1){
		error = "* Please verify that you entered a valid price .\n";
	}
	return error;
}
  
function checkName (strng) {
var error = "";
if (strng == "")
 {
   error = "* Please provide your name.\n";
 }
	return error;    
}    

function checkComments (strng) {
var error = "";
if (strng == "")
 {
   error = "* Please provide comments.\n";
 }
	return error;    
}

function checkEmail(strng){
var error = "";
var filter=/^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/
	if (filter.test(strng))
	{
		error = "";
	}else{
		error = "* Please provide a valid Email Address!\n";	
	}
		return error;
}