function btn_hover(obj) {
 var msrc=obj.src;
 if(msrc.substring(msrc.length-9,msrc.length)=="blank.gif") {
  msrc=obj.style.filter;
  var s_start, s_end;
  s_start = msrc.indexOf("(src='")+6;
  s_end = msrc.indexOf("'", s_start); 
  msrc=msrc.substring(s_start,s_end);
  if(msrc.indexOf("-hover")<0) {
   msrc_new=msrc.substring(0,msrc.lastIndexOf('.'))+"-hover"+msrc.substring(msrc.lastIndexOf('.'),msrc.length);
  } else {
   msrc_new=msrc.substring(0,msrc.indexOf("-hover"))+msrc.substring(msrc.lastIndexOf('.'),msrc.length);
  }
  obj.style.filter = obj.style.filter.replace(msrc, msrc_new);
 } else {
  if(msrc.indexOf("-hover")<0) {
   obj.src=msrc.substring(0,msrc.lastIndexOf('.'))+"-hover"+msrc.substring(msrc.lastIndexOf('.'),msrc.length);
  } else {
   obj.src=msrc.substring(0,msrc.indexOf("-hover"))+msrc.substring(msrc.lastIndexOf('.'),msrc.length);
  }
 }
}
var bhPL = new Array();
function preloadAllImgBtn() { fixPNG(); setTimeout("preloadAllImgBtn_main()", 9000); }
function preloadAllImgBtn_main() {
 if(document.getElementsByTagName) {
  var elem = document.getElementsByTagName("img");
  for(var i=0;i<elem.length;i++) {
   if(elem[i].className.toLowerCase()=='img_btn') { bhPL[bhPL.length]=elem[i].src; }
  }
  elem = document.getElementsByTagName("input");
  for(var i=0;i<elem.length;i++) {
   if(elem[i].className.toLowerCase()=='img_btn') { bhPL[bhPL.length]=elem[i].src; }
  }
 } else if(document.images) {
  var elem=document.images;
  for(var i=0;i<elem.length;i++) {
   if(elem[i].className.toLowerCase()=='img_btn') { bhPL[bhPL.length]=elem[i].src; }
  }
 }
 var imPL = new Array();
 for(var i=0;i<bhPL.length;i++) {
  imPL[i]=new Image();
  imPL[i].src=bhPL[i].substring(0,bhPL[i].lastIndexOf('.'))+"-hover"+bhPL[i].substring(bhPL[i].lastIndexOf('.'),bhPL[i].length);
 }
}

function fixPNG() {
 if(document.body.filters) {
  var wid, hei, elst;
  if(document.getElementsByTagName) {
   var elem = document.getElementsByTagName("img");
   for(var i=0;i<elem.length;i++) {
    if(elem[i].src.substring(elem[i].src.length-3,elem[i].src.length).toUpperCase()=="PNG") {
     if(elem[i].complete!=false) {
      elst = elem[i].style;
      elst.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+elem[i].src+"',sizingMethod='scale')";
      if(elst.width.length==0) { elst.width=elem[i].width; } if(elst.height.length==0) { elst.height=elem[i].height; }
      if(elem[i].className.toLowerCase()=='img_btn') bhPL[bhPL.length]=elem[i].src;
      elem[i].src="images/blank.gif";
     }
    }
   }
   elem = document.getElementsByTagName("input");
   for(var i=0;i<elem.length;i++) {
    if(elem[i].src.substring(elem[i].src.length-3,elem[i].src.length).toUpperCase()=="PNG") {
     if(elem[i].complete!=false) {
      elst = elem[i].style;
      elst.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+elem[i].src+"',sizingMethod='scale')";
      if(elst.width.length==0) { elst.width=elem[i].width; } if(elst.height.length==0) { elst.height=elem[i].height; }
      if(elem[i].className.toLowerCase()=='img_btn') bhPL[bhPL.length]=elem[i].src;
      elem[i].src="images/blank.gif";
     }
    }
   }
  } else if(document.all) {
   elem = document.all;
   for(var i=0;i<elem.length;i++) {
    if((elem[i].tagName.toLowerCase()=="img")||(elem[i].tagName.toLowerCase()=="input")) {
     if(elem[i].src.substring(elem[i].src.length-3,elem[i].src.length).toUpperCase()=="PNG") {
      if(elem[i].complete!=false) {
       elst = elem[i].style;
       elst.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+elem[i].src+"',sizingMethod='scale')";
       if(elst.width.length==0) { elst.width=elem[i].width; } if(elst.height.length==0) { elst.height=elem[i].height; }
       if(elem[i].className.toLowerCase()=='img_btn') bhPL[bhPL.length]=elem[i].src;
       elem[i].src="images/blank.gif";
      }
     }
    }
   }
  }
 }
}


addOnLoad(preloadAllImgBtn);