function selectTab(showContent,selfObj){
	var tab = document.getElementById("tabs").getElementsByTagName("li");
	var tablength = tab.length;
	for(i=0; i<tablength; i++){
		tab[i].className = "";
	}
	selfObj.parentNode.className = "selectTab";
	for(i=0; j=document.getElementById("tabContent"+i); i++){
		j.style.display = "none";
	}
	document.getElementById(showContent).style.display = "block";
	
	
}