function PNGHandler(){var self=this;this.na=navigator.appName.toLowerCase();this.nv=navigator.appVersion.toLowerCase();this.isIE=this.na.indexOf('internet explorer')+1?1:0;this.isWin=this.nv.indexOf('windows')+1?1:0;this.ver=this.isIE?parseFloat(this.nv.split('msie ')[1]):parseFloat(this.nv);this.isMac=this.nv.indexOf('mac')+1?1:0;this.isOpera=(navigator.userAgent.toLowerCase().indexOf('opera ')+1||navigator.userAgent.toLowerCase().indexOf('opera/')+1);if(this.isOpera)this.isIE=false;this.transform=null;this.getElementsByClassName=function(className,oParent){doc=(oParent||document);matches=[];nodes=doc.all||doc.getElementsByTagName('*');for(i=0;i<nodes.length;i++){if(nodes[i].className==className||nodes[i].className.indexOf(className)+1||nodes[i].className.indexOf(className+' ')+1||nodes[i].className.indexOf(' '+className)+1){matches[matches.length]=nodes[i]}};return matches};this.filterMethod=function(oOld){var o=document.createElement('div');var filterID='DXImageTransform.Microsoft.AlphaImageLoader';if(oOld.nodeName=='DIV'){var b=oOld.currentStyle.backgroundImage.toString();oOld.style.backgroundImage='none';var i1=b.indexOf('url("')+5;var newSrc=b.substr(i1,b.length-i1-2).replace('.gif','.png');o=oOld;o.style.writingMode='lr-tb';o.style.filter="progid:"+filterID+"(src='"+newSrc+"',sizingMethod='crop')"}else if(oOld.nodeName=='IMG'){var newSrc=oOld.getAttribute('src').replace('.gif','.png');oOld.src='images/none.gif';oOld.style.filter="progid:"+filterID+"(src='"+newSrc+"',sizingMethod='crop')";oOld.style.writingMode='lr-tb'}};this.pngMethod=function(o){bgImage=this.getBackgroundImage(o);if(bgImage){o.style.backgroundImage='url('+bgImage.replace('.gif','.png')+')'}else if(o.nodeName=='IMG'){o.src=o.src.replace('.gif','.png')}else if(!this.isMac){}};this.getBackgroundImage=function(o){var b,i1;var bgUrl=null;if(o.nodeName=='DIV'&&!(this.isIE&&this.isMac)){if(document.defaultView){if(document.defaultView.getComputedStyle){b=document.defaultView.getComputedStyle(o,'').getPropertyValue('background-image');i1=b.indexOf('url(')+4;bgUrl=b.substr(i1,b.length-i1-1)}else{}}else{}};return bgUrl};this.supportTest=function(){if(this.isIE&&this.isWin&&this.ver>=5.5){self.transform=self.filterMethod}else if(!this.isIE&&this.ver<5){self.transform=null}else if(!this.isIE&&this.ver>=5||(this.isIE&&this.isMac&&this.ver>=5)){self.transform=self.pngMethod}else{self.transform=null;return false};return true};this.init=function(){if(this.supportTest()){this.elements=this.getElementsByClassName('png');for(var i=0;i<this.elements.length;i++){this.transform(this.elements[i])}}}};var pngHandler=new PNGHandler();

function tabit(btn){
	var idname = new String(btn.id);
	var s = idname.indexOf("_");
	var e = idname.lastIndexOf("_")+1;
	var tabName = idname.substr(0, s);
	var id = parseInt(idname.substr(e, 1));
	var tabNumber = btn.parentNode.childNodes.length-1;
	for(i=0;i<tabNumber;i++){
		if(document.getElementById(tabName+"_div_"+i)!=null) //这里需要进行判断 
		{ 

			document.getElementById(tabName+"_div_"+i).style.display = "none";
			document.getElementById(tabName+"_btn_"+i).className = "";
			}
	};
	document.getElementById(tabName+"_div_"+id).style.display = "block";
	btn.className = "curr";
};