var PIXELGIF="images/pngfix.gif";// 这个是个头1*1像素的透明gif图片，请自行建立并放在你网页的相同目录下 

var arVersion = navigator.appVersion.split("MSIE"); 
var version = parseFloat(arVersion[1]); 
var pngxp=/\.png$/i; 
var AlphaPNGfix= "progid:DXImageTransform.Microsoft.AlphaImageLoader"; 
function fixPNGAll() { 
        if(!document.all) return; 
        if ((version >= 5.5 && version < 7) && (document.body.filters)) { 
          for(var i=0; i<document.images.length; i++) { 
                var img = document.images[i]; 
                if(img.src && pngxp.test(img.src)) { 
                  var imgName = img.src; 
                  var imgID = (img.id) ? "id='" + img.id + "' " : ""; 
                  var imgClass = (img.className) ? "class='" + img.className + "' " : ""; 
                  var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "; 
                  var imgStyle = "display:inline-block;" + img.style.cssText; 
                  if (img.align == "left") imgStyle = "float:left;" + imgStyle; 
                  if (img.align == "right") imgStyle = "float:right;" + imgStyle; 
                  if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle; 
                  var strNewHTML = "<span " + imgID + imgClass + imgTitle 
                  + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" 
                  + "filter:" +AlphaPNGfix 
                  + "(src='" + img.src + "', sizingMethod='scale');\"></span>"; 
                  if (img.useMap) { 
                        strNewHTML += "<img style=\"position:relative; left:-" + img.width + "px;" 
                        + "height:" + img.height + "px;width:" + img.width +"\" " 
                        + "src=\"" + PIXELGIF + "\" usemap=\"" + img.useMap  
                        + "\" border=\"" + img.border + "\">"; 
                  } 
                  img.outerHTML = strNewHTML; 
                  i--; 
                } 
          } 
          /* for type=image png button */ 
          var kmax = document.forms.length; 
          for(var k=0; k<kmax; k++) { 
                var fmob = document.forms[k]; 
                var elmarr = fmob.getElementsByTagName("input"); 
                var jmax = elmarr.length; 
                for(var j=0; j<jmax; j++) { 
                        var elmob = elmarr[j]; 
                        if(elmob && elmob.type=="image" && pngxp.test(elmob.src)) { 
                                var origsrc = elmob.src; 
                                elmob.src = PIXELGIF; 
                                elmob.style.filter = AlphaPNGfix+"(src='" +origsrc +"')"; 
                        } 
                } 
          } 
        } 
} 

function fixPNG(img) { 
        if(!document.all) return; 
        var img; 
    if(img && img.src && pngxp.test(img.src)) { 
      var imgName = img.src; 
      var imgID = (img.id) ? "id='" + img.id + "' " : ""; 
      var imgClass = (img.className) ? "class='" + img.className + "' " : ""; 
      var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "; 
      var imgStyle = "display:inline-block;" + img.style.cssText; 
      if (img.align == "left") imgStyle = "float:left;" + imgStyle; 
      if (img.align == "right") imgStyle = "float:right;" + imgStyle; 
      if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle; 
      var strNewHTML = "<span " + imgID + imgClass + imgTitle 
      + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";" 
      + "filter:" +AlphaPNGfix 
      + "(src='" + img.src + "', sizingMethod='scale');\"></span>"; 
      if (img.useMap) { 
        strNewHTML += "<img style=\"position:relative; left:-" + img.width + "px;" 
        + "height:" + img.height + "px;width:" + img.width +"\" " 
        + "src=\"" + PIXELGIF + "\" usemap=\"" + img.useMap  
        + "\" border=\"" + img.border + "\">"; 
      } 
      img.outerHTML = strNewHTML; 
    } 
}