if (document.images)
   {
	//home
	btn_home_on= new Image();
	btn_home_on.src="images/btn_home_on.gif";  
	
	btn_home_off= new Image();
	btn_home_off.src="images/btn_home_off.gif"; 
	
	//about
	btn_about_on= new Image();
	btn_about_on.src="images/btn_about_on.gif";  
	
	btn_about_off= new Image();
	btn_about_off.src="images/btn_about_off.gif"; 
	 
	//services
	btn_services_on= new Image();
	btn_services_on.src="images/btn_services_on.gif";  
	
	btn_services_off= new Image();
	btn_services_off.src="images/btn_services_off.gif"; 	 
	 
	//gallery
	btn_gallery_on= new Image();
	btn_gallery_on.src="images/btn_gallery_on.gif";  
	
	btn_gallery_off= new Image();
	btn_gallery_off.src="images/btn_gallery_off.gif";
	
	//testimonials
	btn_testimonials_on= new Image();
	btn_testimonials_on.src="images/btn_testimonials_on.gif";  
	
	btn_testimonials_off= new Image();
	btn_testimonials_off.src="images/btn_testimonials_off.gif";
	
	//contact
	btn_contact_on= new Image();
	btn_contact_on.src="images/btn_contact_on.gif";  
	
	btn_contact_off= new Image();
	btn_contact_off.src="images/btn_contact_off.gif";
   }


function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "_off.src");
      document[imgName].src= imgOff;
    }
 }


function turnon(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "_on.src");
      document[imgName].src= imgOn;
    }
 }


function checkScript(myForm){
  var field = myForm.email; // email field
  var str = myForm.email.value; // email string
  var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid
  var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/; // valid
  var msg = "";
  var msgTop = "The field(s) listed below still need to be entered correctly\n\n"

	if(myForm.name.value == ""){
	msg += "Name:  -- Please enter your name\n"
	}


  if (!reg2.test(str)) { 
  msg += "E-mail:  -- Please enter your e-mail, \"" + str + "\" is an invalid e-mail\n"; 
  }
  

	if(myForm.message.value == ""){
	msg += "Message:  -- Please enter a message you would like to send to us\n";
	}
	
	if (msg != ""){
	alert(msgTop + msg);
	return false;
	}else{
		return true;
	}
}

function popUp(URL, details){

 newwindow = window.open('gallery_image.php?f='+URL+'&dd='+details+'','mywin','toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=680,height=575,left = '+((screen.width/2)-(680/2))+',top = '+((screen.height/2)-(575/2))+''); 
 
 newwindow.focus();
}