// JavaScript Document

function toggleLayer(whichLayer) {
		var style1 = document.getElementById(whichLayer).style;
		style1.display = ("none");
	}
function toggleLayer2(whichLayer) {
		var style2 = document.getElementById(whichLayer).style;
		style2.display = ("block");
	}
	
 function changeImage1() {
		document.getElementById('testimonials').style.backgroundImage = "url(images/btn-testimonials-active.gif)";
    document.getElementById('productspecs').style.backgroundImage = "url(images/btn-productspecs-inactive.gif)";
		document.getElementById('productwarranty').style.backgroundImage = "url(images/btn-productwarranty-inactive.gif)";
		document.getElementById('installation').style.backgroundImage = "url(images/btn-installation-inactive.gif)";
      }
	  
 function changeImage2() {
		
		document.getElementById('testimonials').style.backgroundImage = "url(images/btn-testimonials-inactive.gif)";
    document.getElementById('productspecs').style.backgroundImage = "url(images/btn-productspecs-active.gif)";
		document.getElementById('productwarranty').style.backgroundImage = "url(images/btn-productwarranty-inactive.gif)";
		document.getElementById('installation').style.backgroundImage = "url(images/btn-installation-inactive.gif)";
      }	  
	  
 function changeImage3() {
		document.getElementById('testimonials').style.backgroundImage = "url(images/btn-testimonials-inactive.gif)";
    document.getElementById('productspecs').style.backgroundImage = "url(images/btn-productspecs-inactive.gif)";
		document.getElementById('productwarranty').style.backgroundImage = "url(images/btn-productwarranty-active.gif)";		
		document.getElementById('installation').style.backgroundImage = "url(images/btn-installation-inactive.gif)";
      }	  
	
 function changeImage4() {
		document.getElementById('testimonials').style.backgroundImage = "url(images/btn-testimonials-inactive.gif)";
    document.getElementById('productspecs').style.backgroundImage = "url(images/btn-productspecs-inactive.gif)";
		document.getElementById('productwarranty').style.backgroundImage = "url(images/btn-productwarranty-inactive.gif)";				
		document.getElementById('installation').style.backgroundImage = "url(images/btn-installation-active.gif)";
      }