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();