var maincontent1 = 4;

function Tomaincontent(item) { 
  for (var i=1; i<= maincontent1; i++) {
    $('#main_content_' + i).hide();
    $('#label_' + i).css("background", "url(images/tabori.jpg) no-repeat");
  }
  $('#main_content_' + item).show();
  $('#label_' + item).css("background", "url(images/tabfocus"+ item +".gif) no-repeat");
}

/*
var d1_1 = "url(images/tabori.jpg) no-repeat"; 
var u1_1 = "url(images/tabfocus.png) no-repeat"; 
var d1_2 = "url(images/tabori.jpg) no-repeat"; 
var u1_2 = "url(images/tabfocus.png) no-repeat"; 
var d1_3 = "url(images/tabori.jpg) no-repeat"; 
var u1_3 = "url(images/tabfocus.png) no-repeat"; 
var d1_4 = "url(images/tabori.jpg) no-repeat"; 
var u1_4 = "url(images/tabfocus.png) no-repeat"; 

function Tomaincontent(item) { 
  for (var i=1; i<= maincontent1; i++) {
    main_content = document.getElementById("main_content_"+ i); 
    label = document.getElementById("label_"+ i); 
    main_content.style.display = "none"; 
    label.style.background = eval("d1_"+i); 
  }
  main_content = document.getElementById("main_content_"+ item); 
	label = document.getElementById("label_"+ item); 
  main_content.style.display = "block"; 
	label.style.background = eval("u1_"+item); 
}
*/