function str2img(str) {
    var src = 'http://res.iciba.com/resource/yinbiao/';
    var lenStr = str.length;
    var rsString    = "";
    for (var i=0;i<lenStr;i++) {
        var theChar   = str.substr(i,1);
        if (theChar == " ") {
            rsString += " ";
        } else if (theChar == "-") {
            rsString += "<img src=\""+src+"zhonggangxian.png\" border=\"0\" align=\"absmiddle\" />";
        } else if (theChar == "_") {
            rsString += "<img src=\""+src+"/xiahuaxian.png\" border=\"0\" align=\"absmiddle\" />";
        } else if (theChar == ".") {
            rsString += "<img src=\""+src+"dian.png\" border=\"0\" align=\"absmiddle\" />";
        } else if (theChar == "\\") {
            rsString += "<img src=\""+src+"xiexian.png\" border=\"0\" align=\"absmiddle\" />";
        } else if (theChar == "/") {
            rsString += "<img src=\""+src+"fanxiexian.png\" border=\"0\" align=\"absmiddle\" />";
        } else if (theChar == "?") {
            rsString += "<img src=\""+src+"wenhao.png\" border=\"0\" align=\"absmiddle\" />";
        } else{
            rsString += "<img src=\""+src+theChar+".png\" border=\"0\" align=\"absmiddle\" />";
        }
    }

    document.write(rsString);
}