var tabgg;
tabgg=0;
setTimeout('change_tabgg()',4000);
function change_tabgg()
{
 if(tabgg > 3) tabgg=0
 setTimeout('setFocusstabgg('+tabgg+')',4000);
 tabgg++;
 tttabgg=setTimeout('change_tabgg()',4000);
}
function setFocusstabgg(i)
{
 selectLayerstabgg(i);
}
function selectLayerstabgg(i)
{
 switch(i)
 {
 case 0:
	 document.getElementById("tab_40").style.display="";
	 document.getElementById("tab_41").style.display="none";
	 document.getElementById("tab_42").style.display="none";
	 document.getElementById("tab_43").style.display="none";
	 document.getElementById("bigimg_40").style.display="";
	 document.getElementById("bigimg_41").style.display="none";
	 document.getElementById("bigimg_42").style.display="none";
	 document.getElementById("bigimg_43").style.display="none";
 break;
 case 1:
	 document.getElementById("tab_40").style.display="none";
	 document.getElementById("tab_41").style.display="";
	 document.getElementById("tab_42").style.display="none";
	 document.getElementById("tab_43").style.display="none";
	 document.getElementById("bigimg_40").style.display="none";
	 document.getElementById("bigimg_41").style.display="";
	 document.getElementById("bigimg_42").style.display="none";
	 document.getElementById("bigimg_43").style.display="none";
 break;
 case 2:
	 document.getElementById("tab_40").style.display="none";
	 document.getElementById("tab_41").style.display="none";
	 document.getElementById("tab_42").style.display="";
	 document.getElementById("tab_43").style.display="none";
	 document.getElementById("bigimg_40").style.display="none";
	 document.getElementById("bigimg_41").style.display="none";
	 document.getElementById("bigimg_42").style.display="";
	 document.getElementById("bigimg_43").style.display="none";
 break;
 case 3:
	 document.getElementById("tab_40").style.display="none";
	 document.getElementById("tab_41").style.display="none";
	 document.getElementById("tab_42").style.display="none";
	 document.getElementById("tab_43").style.display="";
	 document.getElementById("bigimg_40").style.display="none";
	 document.getElementById("bigimg_41").style.display="none";
	 document.getElementById("bigimg_42").style.display="none";
	 document.getElementById("bigimg_43").style.display="";
 break;
 }
}