function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_home_over = newImage("http://www.michelcohen.net/images/nav-home-over.gif");
		nav_services_over = newImage("http://www.michelcohen.net/images/nav-services-over.gif");
		nav_clients_over = newImage("http://www.michelcohen.net/images/nav-clients-over.gif");
		nav_about_over = newImage("http://www.michelcohen.net/images/nav-about-over.gif");
		nav_contact_over = newImage("http://www.michelcohen.net/images/nav-contact-over.gif");
		logo_over = newImage("http://www.michelcohen.net/images/logo-over.gif");
		preloadFlag = true;
	}
}

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validateForm(theForm)
{
	// Customize these calls for your form

	// Start ------->
	if (!validRequired(theForm.name,"Your Name"))
		return false;

	if (!validEmail(theForm.email,"Email Address",true))
		return false;

	if (!validRequired(theForm.subject,"Subject"))
		return false;

	if (!validRequired(theForm.message,"Message"))
		return false;


	// <--------- End
	
	return true;
}

function go ( URL ) {
	popup = window.open ( URL, 'client','width=740,height=500,resizable=1,scrollbars=1,location=1,top=20,left=20,toolbar=1,menubar=1');
	if ( popup.opener == null ) {
		remote.opener = window;
	}
	popup.focus();
}

function showHide(DivID, State) // 1 visible, 0 hidden
{
    if(document.layers)	   //NN4+
    {
       document.layers[DivID].visibility = State ? "show" : "hide";
       document.layers[DivID].display = State ? "block" : "none";
    }
    else if(document.getElementById)	  //gecko(NN6) + IE 5+
    {
        var obj = document.getElementById(DivID);
        obj.style.visibility = State ? "visible" : "hidden";
        obj.style.display = State ? "block" : "none";
    }
    else if(document.all)	// IE 4
    {
        document.all[DivID].style.visibility = State ? "visible" : "hidden";
        document.all[DivID].style.display = State ? "block" : "none";
    }
}


function hideClients(count) // 1 visible, 0 hidden
{
	var x=1;
	while(x <= count)
	{
		showHide(x,0);
		x++;
	}
}