function isNumber(value) {
	var isNumeric = false;

    var numericPattern = /[a-zA-Z]/;

	var matchArray = value.toString().match(numericPattern);

	if(matchArray != null) {


		isNumeric = false;

	}else{

        if(value > 0 )
        isNumeric = true;
        else{

        isNumeric = false;
        }

    }

	return isNumeric;
}




function checkForm() {

var num;

num = document.getElementById("price").value;

if (document.getElementById("name").value == ""){
hideAllErrors();
document.getElementById("nameError").style.display = "inline";
document.getElementById("name").select();
document.getElementById("name").focus();
return false;
}
else
if (document.getElementById("email").value == "") {
hideAllErrors();
document.getElementById("emailError").style.display = "inline";
document.getElementById("email").select();
document.getElementById("email").focus();
return false;
}else
if (document.getElementById("password").value == "") {
hideAllErrors();
document.getElementById("passwordError").style.display = "inline";
document.getElementById("password").select();
document.getElementById("password").focus();
return false;
}
else
if (document.getElementById("price").value == "") {
hideAllErrors();
document.getElementById("priceError").style.display = "inline";
document.getElementById("price").select();
document.getElementById("price").focus();
return false;
}else
if(isNumber(num)){
return true;
}else{
hideAllErrors();
document.getElementById("priceError").style.display = "inline";
document.getElementById("price").select();
document.getElementById("price").focus();
return false;
}

return true;
}

function hideAllErrors() {
document.getElementById("nameError").style.display = "none"
document.getElementById("emailError").style.display = "none"
document.getElementById("passwordError").style.display = "none"
document.getElementById("priceError").style.display = "none"
}