function openSubmenu(div_id) {
	// Set colour of link and text
	document.getElementById("signin").style.color = "#FFF";
	document.getElementById("signin").style.backgroundColor = "#000";
	document.getElementById(div_id).style.display = "block";
}

function hideSubmenu(div_id) {
	// Set colour of link and text
	document.getElementById("signin").style.color = "#000";
	document.getElementById("signin").style.backgroundColor = "#FFF";
	document.getElementById(div_id).style.display = "none";
}

function setField(state, field_id) {
	if(state == "clear") {
		// Clear the requested form field (text input fields)
		document.getElementById(field_id).value = "";
	} else {
		// Display the standard message
		document.getElementById(field_id).value = "Search for...";
	}
}

function toggleSubmenu(div_id) {
	if (document.getElementById) {
		var style2 = document.getElementById(div_id).style;
		style2.display = style2.display? "":"block";

		if(style2.display == "block") {
			document.getElementById("signin").style.color = "#FFF";
			document.getElementById("signin").style.backgroundColor = "#000";
		} else {
			document.getElementById("signin").style.color = "#000";
			document.getElementById("signin").style.backgroundColor = "#FFF";
		}
	} else if (document.all) {
		// this is the way old msie versions work
		var style2 = document.all[div_id].style;
		style2.display = style2.display? "":"block";

		if(style2.display == "block") {
			document.getElementById("signin").style.color = "#FFF";
			document.getElementById("signin").style.backgroundColor = "#000";
		} else {
			document.getElementById("signin").style.color = "#000";
			document.getElementById("signin").style.backgroundColor = "#FFF";
		}
	} else if (document.layers) {
		// this is the way nn4 works
		var style2 = document.layers[div_id].style;
		style2.display = style2.display? "":"block";

		if(style2.display == "block") {
			document.getElementById("signin").style.color = "#FFF";
			document.getElementById("signin").style.backgroundColor = "#000";
		} else {
			document.getElementById("signin").style.color = "#000";
			document.getElementById("signin").style.backgroundColor = "#FFF";
		}
	}
}