function cekGabung() {

	var con = true;

	var error = "Sorry: \n";

	var code = 0;

	

	if (document.gabung.title.value == "") {

		error += "- Please type your Title\n";

		code = 1;

		con = false;

	}

	

	if (document.gabung.category.value == "") {

		error += "- Please type your Category\n";

		code = 1;

		con = false;

	}

	
	
	if (document.gabung.author.value == "") {

		error += "- Please type your Author\n";

		code = 1;

		con = false;

	}

	
	
	if (document.gabung.priceintax.value == "") {

		error += "- Please type your Price incl Tax\n";

		code = 1;

		con = false;

	}

	

	if (document.gabung.priceextax.value == "") {

		error += "- Please type your Price encl Tax\n";

		code = 1;

		con = false;

	}

	
	
	if (document.gabung.noproduct.value == "") {

		error += "- Please type your No of Product per box\n";

		code = 1;

		con = false;

	}

	

	if (document.gabung.weight.value == "") {

		error += "- Please type your Weight\n";

		code = 1;

		con = false;

	}

	

	if (document.gabung.email.value == "") {

		error += "- Please type your Email\n";

		code = 1;

		con = false;

	} else if (document.gabung.email.value.indexOf("@", 0) == -1 || 

		document.gabung.email.value.indexOf(".", 0) == -1) {

		error += "- Your email address is not valid\n";

		code = 1;

		con = false;

	}

	

	if (document.gabung.description.value == "") {

		error += "- Please type your Description\n";

		code = 1;

		con = false;

	}

	
	
		if (document.gabung.instruction.value == "") {

		error += "- Please type your Instruction\n";

		code = 1;

		con = false;

	}


	
	if (document.gabung.note.value == "") {

		error += "- Please type your Note\n";

		code = 1;

		con = false;

	}

	

	if (code == 1) {

		alert(error);

		return con;

	}

}