function tabHide(){
	document.getElementById("showBtn").style.display="block";
	document.getElementById("hideBtn").style.display="none";
	document.getElementById("Left").style.marginLeft="-272px";
}
function tabShow(){
	document.getElementById("showBtn").style.display="none";
	document.getElementById("hideBtn").style.display="block";
	document.getElementById("Left").style.marginLeft="-2px";
}