var currpage = 0;

function showTab(tabno)
{
preloadImages();
document.getElementById("tab1").src = "images/tab_up_01.jpg";
document.getElementById("tab2").src = "images/tab_up_02.jpg";
document.getElementById("tab3").src = "images/tab_up_03.jpg";
document.getElementById("tab4").src = "images/tab_up_04.jpg";
document.getElementById("tab5").src = "images/tab_up_05.jpg";
document.getElementById("tab6").src = "images/tab_up_06.jpg";
document.getElementById("tab7").src = "images/tab_up_07.jpg";
document.getElementById("tabContent1").style.display = "none";
document.getElementById("tabContent2").style.display = "none";
document.getElementById("tabContent3").style.display = "none";
document.getElementById("tabContent4").style.display = "none";
document.getElementById("tabContent5").style.display = "none";
document.getElementById("tabContent6").style.display = "none";
document.getElementById("tabContent7").style.display = "none";

document.getElementById("tab"+tabno).src = "images/tab_down_0"+tabno+".jpg";
document.getElementById("tabContent"+tabno).style.display = "block";

}

function preloadImages()
{
 if (document.images)
    {
      preload_image_object0 = new Image();
	  preload_image_object1 = new Image();
	  preload_image_object2 = new Image();
	  preload_image_object3 = new Image();
	  preload_image_object4 = new Image();
	  preload_image_object5 = new Image();
	  preload_image_object6 = new Image();
	  preload_image_object7 = new Image();
	  preload_image_object8 = new Image();
	  preload_image_object9 = new Image();
	  preload_image_object10 = new Image();
	  preload_image_object11 = new Image();
	  preload_image_object12 = new Image();
	  preload_image_object13 = new Image();


      preload_image_object0.src = "images/tab_up_01.jpg";
	  preload_image_object1.src = "images/tab_up_02.jpg";
	  preload_image_object2.src = "images/tab_up_03.jpg";
	  preload_image_object3.src = "images/tab_up_04.jpg";
	  preload_image_object4.src = "images/tab_up_05.jpg";
	  preload_image_object5.src = "images/tab_up_06.jpg";
	  preload_image_object6.src = "images/tab_up_07.jpg";
	  preload_image_object7.src = "images/tab_download_01.jpg";
	  preload_image_object8.src = "images/tab_download_02.jpg";
	  preload_image_object9.src = "images/tab_download_03.jpg";
	  preload_image_object10.src = "images/tab_download_04.jpg";
	  preload_image_object11.src = "images/tab_download_05.jpg";
	  preload_image_object12.src = "images/tab_download_06.jpg";
	  preload_image_object13.src = "images/tab_download_07.jpg";

    }

}