function validateContactUs(form) {

	if (form.name.value == "") {
		alert( "Please enter Your name." );
		form.name.focus();
		return false ;
	}
	if (form.email.value == "") {
		alert( "Please entyer Your e-mail address" );
		form.email.focus();
		return false ;
	} else if (form.email.value != "") {
		re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
		if (re.test(form.email.value) == false){
			alert("E-mail address is incorrect");
			form.email.focus();
			return false;
		}
	}
	if (form.subject.value == "") {
		alert( "Please enter subject." );
		form.subject.focus();
		return false ;
	}
	if (form.text.value == "") {
		alert( "Please enter text." );
		form.text.focus();
		return false ;
	}
	if (form.username.value == "") {
		alert( "Please enter security code" );
		form.username.focus();
		return false ;
	}

	return true ;
}

function validateShop(form) {

	if (form.name.value == "") {
		alert( "Please enter Your name." );
		form.name.focus();
		return false ;
	}
	if (form.email.value == "") {
		alert( "Please entyer Your e-mail address" );
		form.email.focus();
		return false ;
	} else if (form.email.value != "") {
		re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
		if (re.test(form.email.value) == false){
			alert("E-mail address is incorrect");
			form.email.focus();
			return false;
		}
	}
	if (form.subject.value == "") {
		alert( "Please enter subject." );
		form.subject.focus();
		return false ;
	}
	if (form.text.value == "") {
		alert( "Please enter text." );
		form.text.focus();
		return false ;
	}
	if (form.username.value == "") {
		alert( "Please enter security code" );
		form.username.focus();
		return false ;
	}

	return true ;
}