function showmenu(what) {
	document.getElementById('subMenu_'+what).style.display="block";
}

function hidemenu(what) {
	document.getElementById('subMenu_'+what).style.display="none";
}

function shmenu(what) {
	if(document.getElementById('subMenu_'+what).style.display=="block")
		document.getElementById('subMenu_'+what).style.display="none";
	else
		document.getElementById('subMenu_'+what).style.display="block";
}

function CheckEmail (email) {

	if (email.value.length < 1 ){
		alert("E-mail is a  mandatory field");
		email.focus();
		return false;
	}

			e = email.value.toString();
			t = e.indexOf("@");
		if((e.indexOf(".") == -1) || (t == -1) || (t < 1) || (t > e.length - 5) || (e.charAt(t - 1) == '.') || (e.charAt(t + 1) == '.')) {
			
		alert("Check E-mail");
		email.focus();
			
		return false;
		} 
	
}


function CheckContactForm (f) {

	if (f.Name.value.length < 1 ){
		alert("Name is a mandatory field");
		f.Name.focus();
		return false;
	}
	
	if (f.Postcode.value.length < 1 ){
		alert("Postcode is a  mandatory field");
		f.Postcode.focus();
		return false;
	}
	
	if (f.Telephone.value.length < 1 ){
		alert("Telephone is a  mandatory field");
		f.Telephone.focus();
		return false;
	}
	
		if (CheckEmail (f.Email) === false) {
		
		return false;
		
		}
	
}