function PngForIE(imgPath){
    if(getElementsByClassName(document, "IMG", "png")){
        var myPNG = getElementsByClassName(document, "IMG", "png");

        for(i=0; i<myPNG.length; i++){
            myPNG[i].style.background = "none";
            myPNG[i].runtimeStyle.filter= "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + myPNG[i].src + "',sizingMethod='scale')";
            myPNG[i].src = imgPath;
        }
    }
}

function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements)
}