function makevisible(cur,which){    
if (which==0)    
cur.filters.alpha.opacity=100   
else   
cur.filters.alpha.opacity=70   
}    
if (document.getElementById){ //DynamicDrive.com change
document.write('<style type="text/css">\n')
document.write('.caitiao{display: none;}\n')
document.write('</style>\n')
}
function SwitchMenu(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
	var ar = document.getElementById("masterdiv").getElementsByTagName("span"); //DynamicDrive.com change
		if(el.style.display != "block"){ //DynamicDrive.com change
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="caitiao") //DynamicDrive.com change
				ar[i].style.display = "none";
			}
			el.style.display = "block";
		}
	}
}
function switch_menu_pic(n)
{
  for(i=0;i<mainTable.tBodies.length;i++)
    mainTable.tBodies[i].style.display="none";
  mainTable.tBodies[n].style.display="block";
}