function tab(whichTab) {
	
	var tab1 = document.getElementById('t1');
	var tab2 = document.getElementById('t2');
	var tab3 = document.getElementById('t3');
	
	if (whichTab == "t1") {
		tab1.src = "images/tab_mod/tab_one_on.jpg";
		tab2.src = "images/tab_mod/tab_two_off.jpg";
		tab3.src = "images/tab_mod/tab_three_off.jpg";
		
	} else if (whichTab == "t2") {
		tab1.src = "images/tab_mod/tab_one_off.jpg";
		tab2.src = "images/tab_mod/tab_two_on.jpg";
		tab3.src = "images/tab_mod/tab_three_off.jpg";
		
	} else if (whichTab == "t3") {
		tab1.src = "images/tab_mod/tab_one_off.jpg";
		tab2.src = "images/tab_mod/tab_two_off.jpg";
		tab3.src = "images/tab_mod/tab_three_on.jpg";
	}
	
}



$(document).ready(function(){
  
  $("#tabs-txt").load("tab_1.html");
  
  $("a.t1").click(function () {
  		$("#tabs-txt").load("tab_1.html");
  });
  
  $("a.t2").click(function () {
  		$("#tabs-txt").load("tab_2.html");
  });
  
  $("a.t3").click(function () {
  		$("#tabs-txt").load("tab_3.html");
  });
  
});