var bgIndex = 1;

function changeHomeContentBg() {
	if(bgIndex < 8) {
		bgIndex = bgIndex + 1;
	}
	else {
		bgIndex = 1;
	}	
	//alert("bgIndex = " + bgIndex);
	//alert(document.getElementById("homeLeft"));
	switch(bgIndex) {
		case 1:
			document.getElementById("homeLeft").className = "homeBg1";
			break;
		case 2:
			document.getElementById("homeLeft").className = "homeBg2";
			break;
		case 3:
			document.getElementById("homeLeft").className = "homeBg3";
			break;
		case 4:
			document.getElementById("homeLeft").className = "homeBg4";
			break;
		case 5:
			document.getElementById("homeLeft").className = "homeBg5";
			break;
		case 6:
			document.getElementById("homeLeft").className = "homeBg6";
			break;
		case 7:
			document.getElementById("homeLeft").className = "homeBg7";
			break;
			
		default:
			document.getElementById("homeLeft").className = "homeBg1";
			break;
	
	} //end switch
}


setInterval("changeHomeContentBg()",15000);