function doFilter(){
				  var y=((document.documentElement.clientHeight || document.body.clientHeight) / 2 +(blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop));
					var height =0;
					var width = 0;
					height = (document.body.scrollHeight || document.documentElement.offsetHeight);
					width = (document.body.scrollWidth || document.documentElement.offsetWidth);
					$('#main_1').attr("style","Height:"+height+"px;Width:"+width+"px;Z-Index:999");
		   		$('#main_1').show();
		   		var width = width/2;
		
					$('#bsy').attr("style","position: absolute; top:"+y+"px; left:50%; width:80px; border: 1px ridge #ccc; background-color: #e95555; color: #eee; padding: 3px;Z-Index:9999");
					$('#bsy').show();
		}
//启动AJAX
$(function(){
			$('<div id="main_1"></div>').appendTo("#main")
			$('<div id="bsy" style="display:none"><img src="/imgs/busy.gif">&nbsp;请稍候...</div>')
			.ajaxStart(function() {doFilter();})
			.ajaxStop(function() {$('#bsy').hide();$('#main_1').hide();})
			.appendTo("#main");
		});