/*mainleft*/
var diffequ=document.getElementById("diffEqu");
var lay1=document.getElementById("menu_lay1");
var lay2=document.getElementById("menu_lay2");
var diffgrand=document.getElementById("diffGrand");
diffequ.style.display="block";
lay1.className="menu_layOn";
document.getElementById("Gmore").style.display="none";
diffgrand.style.display="none";
function ChangeMenu(i){
 	switch(i){
	  case 0:
	  	diffequ.style.display="block";		
		diffgrand.style.display="none";
		document.getElementById("Emore").style.display="block";
		document.getElementById("Gmore").style.display="none";
		document.getElementById("menuFrame0").style.display="block";
		document.getElementById("menuFrame1").style.display="none";
		lay1.className="menu_layOn";
		lay2.className="";
		break;
	  case 1:
	    diffequ.style.display="none";		
		diffgrand.style.display="block";
		document.getElementById("Emore").style.display="none";
		document.getElementById("Gmore").style.display="block";
		document.getElementById("menuFrame0").style.display="none";
		document.getElementById("menuFrame1").style.display="block";
		lay1.className="";
		lay2.className="menu_layOn";
		break;
	}
}