var bigswitch = new SwitchPic(
				{
					bigpic:"SwitchBigPic",
					switchnav:"SwitchNav",
					selectstyle:"selected",
					objname:"bigswitch"
				}
			) ;
			bigswitch.goSwitch(bigswitch,0);
			bigswitch.autoSwitchTimer = setTimeout("bigswitch.autoSwitch(bigswitch) ;", 3000);
			//主页