function echeck(str) {

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   //alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   //alert("Invalid E-mail ID")
	   return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		//alert("Invalid E-mail ID")
		return false
	}

	 if (str.indexOf(at,(lat+1))!=-1){
		//alert("Invalid E-mail ID")
		return false
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		//alert("Invalid E-mail ID")
		return false
	 }

	 if (str.indexOf(dot,(lat+2))==-1){
		//alert("Invalid E-mail ID")
		return false
	 }
	
	 if (str.indexOf(" ")!=-1){
		//alert("Invalid E-mail ID")
		return false
	 }

	 return true					
}

function validate_review() {
	
	// name
	if (document.getElementById("name").value.length < 1) {
		alert("Please enter a valid name.");
		document.getElementById("name_label").style.color = "red";
		document.getElementById("name").focus();
		return false;
	} else {
		document.getElementById("name_label").style.color = "black";
	}
	
	// email_1 (validate)
	if (echeck(document.getElementById("email_1").value) == false) {
		alert("Please enter a valid email address.");
		document.getElementById("email_1_label").style.color = "red";
		document.getElementById("email_1").focus();
		return false;
	} else {
		document.getElementById("email_1_label").style.color = "black";
	}
	
	// email_2
	if (document.getElementById("email_2").value != document.getElementById("email_1").value) {
		alert("Please make sure the email addresses are the same.");
		document.getElementById("email_2_label").style.color = "red";
		document.getElementById("email_2").focus();
		return false;
	} else {
		document.getElementById("email_2_label").style.color = "black";
	}
	
	// town
	if (document.getElementById("town").value.length < 1) {
		alert("Please enter a valid town / city.");
		document.getElementById("town_label").style.color = "red";
		document.getElementById("town").focus();
		return false;
	} else {
		document.getElementById("town_label").style.color = "black";
	}
	
	// sex
	if (document.getElementById("sex").value == 'select') {
		alert("Please select your sex.");
		document.getElementById("sex_label").style.color = "red";
		document.getElementById("sex").focus();
		return false;
	} else {
		document.getElementById("sex_label").style.color = "black";
	}
	
	// age
	if (document.getElementById("age").value.length < 1) {
		alert("Please enter a valid age.");
		document.getElementById("age_label").style.color = "red";
		document.getElementById("age").focus();
		return false;
	} else {
		document.getElementById("age_label").style.color = "black";
	}
	
	// type
	if (document.getElementById("type").value == 'select') {
		alert("Please select a review type.");
		document.getElementById("type_label").style.color = "red";
		document.getElementById("type").focus();
		return false;
	} else {
		document.getElementById("type_label").style.color = "black";
	}
	
	// category
	if (document.getElementById("category_id").value == 'select') {
		alert("Please select a category.");
		document.getElementById("category_id_label").style.color = "red";
		document.getElementById("category_id").focus();
		return false;
	} else {
		document.getElementById("category_id_label").style.color = "black";
	}
	
	// subcategory
	if (document.getElementById("subcategory_id").value == 'select') {
		alert("Please select a subcategory.");
		document.getElementById("subcategory_id_label").style.color = "red";
		document.getElementById("subcategory_id").focus();
		return false;
	} else {
		document.getElementById("category_id_label").style.color = "black";
	}
	
	// brand_name
	if (document.getElementById("brand_name").value.length < 1) {
		alert("Please enter a valid brand name.");
		document.getElementById("brand_name_label").style.color = "red";
		document.getElementById("brand_name").focus();
		return false;
	} else {
		document.getElementById("brand_name_label").style.color = "black";
	}
	
	// review
	if (document.getElementById("review").value.length < 1) {
		alert("Please enter a valid review.");
		document.getElementById("review_label").style.color = "red";
		document.getElementById("review").focus();
		return false;
	} else {
		document.getElementById("review_label").style.color = "black";
	}
	
	if (!document.getElementById("agree").checked) {
		alert("Please read our terms and conditions and tick the checkbox if you agree with them.");
		return false;
	}
	
	/*// product_name
	if (document.getElementById("product_name").value.length < 1) {
		alert("Please enter a valid product name.");
		document.getElementById("product_name_label").style.color = "red";
		document.getElementById("product_name").focus();
		return false;
	} else {
		document.getElementById("product_name_label").style.color = "black";
	}*/
			
	if (document.getElementById('result').innerHTML != 'PASS') {
		//getParam(document.getElementById('request'));
		alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
		document.getElementById("txtCaptcha").focus();
		return false;
	}
	
}
function validateTell() {
		
		// from
		if (echeck(document.getElementById("from").value) == false) {
			alert("Please enter a valid email address.");
			document.getElementById("from_label").style.color = "red";
			document.getElementById("from").focus();
			return false;
		} else {
			document.getElementById("from_label").style.color = "black";
		}
		
		// to
		if (echeck(document.getElementById("to").value) == false) {
			alert("Please enter a valid email address.");
			document.getElementById("to_label").style.color = "red";
			document.getElementById("to").focus();
			return false;
		} else {
			document.getElementById("to_label").style.color = "black";
		}
		
		// subject
		if (document.getElementById("subject").value.length < 5) {
			alert("Please enter a valid subject.");
			document.getElementById("subject_label").style.color = "red";
			document.getElementById("subject").focus();
			return false;
		} else {
			document.getElementById("subject_label").style.color = "black";
		}
		
		// message
		if (document.getElementById("message").value.length < 5) {
			alert("Please enter a valid message.");
			document.getElementById("message_label").style.color = "red";
			document.getElementById("message").focus();
			return false;
		} else {
			document.getElementById("message_label").style.color = "black";
		}
		
		if (document.getElementById('result').innerHTML != 'PASS') {
			//getParam(document.getElementById('request'));
			alert("Please enter the exact code on the image into the text box and click the SECURITY CHECK link.");
			document.getElementById("txtCaptcha").focus();
			return false;
		}	
}