var maincontent1 = 4;
var d1 = "url(images/index/CitizensLabelHoverBg.jpg) no-repeat"; 
var u1 = "url(images/index/CitizensLabelLinkBg.jpg) no-repeat"; 
var d2 = "url(images/index/CitizensLabelHoverBg.jpg) no-repeat"; 
var u2 = "url(images/index/CitizensLabelLinkBg.jpg) no-repeat"; 
var d3 = "url(images/index/CitizensLabelHoverBg.jpg) no-repeat"; 
var u3 = "url(images/index/CitizensLabelLinkBg.jpg) no-repeat"; 
var d4 = "url(images/index/CitizensLabelHoverBg.jpg) no-repeat"; 
var u4 = "url(images/index/CitizensLabelLinkBg.jpg) no-repeat"; 

var d5 = "url(images/index/CitizensLabelHoverBgR.jpg) no-repeat"; 
var u5 = "url(images/index/CitizensLabelLinkBgR.jpg) no-repeat"; 

function Tomaincontent(item) 
{ 
  for (var i=1; i<= maincontent1; i++){
    main_content = document.getElementById("main_content_"+ i); 
	label = document.getElementById("label_"+ i); 
	label.getElementsByTagName("a").item(0).className= "";
    main_content.style.display = "none"; 
	label.style.background = eval("u"+i); 
  }
    main_content = document.getElementById("main_content_"+ item); 
	label = document.getElementById("label_"+ item); 
	label.getElementsByTagName("a").item(0).className= "focus";
    main_content.style.display = "block"; 
	label.style.background = eval("d"+item); 
}