home1 =new Image;
home2 =new Image;
services1 =new Image;
services2 =new Image;
gallery1 =new Image;
gallery2 =new Image;
about1 =new Image;
about2 =new Image;
contact1 =new Image;
contact2 =new Image;
first1 = new Image;
first2 = new Image;
second1 = new Image;
second2 = new Image;
third1 = new Image;
third2 = new Image;
forth1 = new Image;
forth2 = new Image;
fifth1 = new Image;
fifth2 = new Image;
sixth1 = new Image;
sixth2 = new Image;
seventh1 = new Image;
seventh2 = new Image;
function pre_load(){
home1.src = "images/button_home.gif";
home2.src = "images/button_home2.gif";
services1.src="images/button_services.gif";
services2.src="images/button_services2.gif";
gallery1.src="images/button_gallery.gif";
gallery2.src="images/button_gallery2.gif";
about1.src="images/button_about.gif";
about2.src="images/button_about2.gif";
contact1.src="images/button_contact.gif";
contact2.src="images/button_contact2.gif";
first1.src = "images/first.gif";
first2.src = "images/first2.gif";
second1.src = "images/second.gif";
second2.src = "images/second2.gif";
third1.src = "images/third.gif";
third2.src = "images/third2.gif";
forth1.src = "images/forth.gif";
forth2.src = "images/forth2.gif";
fifth1.src = "images/fifth.gif";
fifth2.src = "images/fifth2.gif";
sixth1.src = "images/sixth.gif";
sixth2.src = "images/sixth2.gif";
seventh1.src = "images/seventh.gif";
seventh2.src = "images/seventh2.gif";
}

function tab_over(tab){
document.getElementById(tab).src=eval(tab+"2").src;
}

function tab_out(tab){
document.getElementById(tab).src=eval(tab+"1").src;
}