function showmenu(elmnt) {
	document.getElementById(elmnt).style.visibility="visible";
}

function hidemenu(elmnt) {
	document.getElementById(elmnt).style.visibility="hidden";
}

function fbvisible(elmnt) {
	document.getElementById(elmnt).style="opacity:1;filter:alpha(opacity=100)";
}

function fbhide(elmnt) {
	document.getElementById(elmnt).style="opacity:0.5;filter:alpha(opacity=50)";
}

function clearfield(fld, defaulttext) {
	if (fld.value == defaulttext) {
		fld.value = "";
	}
}

function recallfield(fld, defaulttext) {
	if (fld.value == "") {
		fld.value = defaulttext;
	}
}

function validateDetails() {
	if(document.getElementById("u_name").value != "Your Name" && document.getElementById("u_name").value != "" && document.getElementById("u_email").value != "Your Email" && document.getElementById("u_email").value != "" &&document.getElementById("u_message").value != "Message" && document.getElementById("u_message").value != "") 
	{
	   document.getElementById("submit").disabled = false;
	}
	else
	{
	    document.getElementById("submit").disabled = true;
	}
}