var setInterval
var setInterval1

function ch_tab(a){
	clearTimeout(setInterval);
	for(i=1;i<=4;i++){
		if(i==a){
			document.getElementById('tab1_'+i).style.display="block";
			document.getElementById('tab1_ImgL_'+i).style.backgroundImage="url('images/tabH_curve1.jpg')";
			document.getElementById('tab1_ImgR_'+i).style.backgroundImage="url('images/tabH_curve2.jpg')";
			document.getElementById('tab1_ImgH_'+i).style.backgroundImage="url('images/tabH_bg.jpg')";
			document.getElementById('tab1_ImgH_'+i).className="tabOn";			
		}
		else{
			document.getElementById('tab1_'+i).style.display="none";
			document.getElementById('tab1_ImgL_'+i).style.backgroundImage="url('images/tab_bg.jpg')";
			document.getElementById('tab1_ImgR_'+i).style.backgroundImage="url('images/tab_bg.jpg')";
			document.getElementById('tab1_ImgH_'+i).style.backgroundImage="url('images/tab_bg.jpg')";
			document.getElementById('tab1_ImgH_'+i).className="tabOff";
		}
	}	
}
function startTab_ind(a){
	for(i=1;i<4;i++){
		if(i==a){
			document.getElementById('tab4_'+i).style.display="block";
		}
		else{
			document.getElementById('tab4_'+i).style.display="none";
			}
	}
	if(a>2)
		a=1;
	else
		a++;
	setInterval1 = setTimeout("startTab_ind('"+a+"')",7000);
}