function showAll(){
    document.getElementById("formatContent").innerHTML="<input type=\"radio\" name=\"allsort\" value=\"all\" checked=\"checked\"/>全部 \
			    <input type=\"radio\" name=\"allsort\" value=\"photo\" />图片\
			    <input type=\"radio\" name=\"allsort\" value=\"audio\" />音乐\
			    <input type=\"radio\" name=\"allsort\" value=\"video\" />视频\
			    <input type=\"radio\" name=\"allsort\" value=\"word\" />文档";
    document.getElementById("all").style.fontWeight="bold";
    document.getElementById("all").style.color="black";
    document.getElementById("photo").removeAttribute("style");
    document.getElementById("audio").removeAttribute("style");
    document.getElementById("video").removeAttribute("style");
    document.getElementById("word").removeAttribute("style");
}
function showPhoto(){
    document.getElementById("formatContent").innerHTML="<input type=\"radio\" name=\"format\" value=\"all\" checked=\"checked\"/>全部 \
			    <input type=\"radio\" name=\"format\" value=\"jpg\" />jpg\
			    <input type=\"radio\" name=\"format\" value=\"gif\" />gif\
			    <input type=\"radio\" name=\"format\" value=\"bmp\" />bmp\
			    <input type=\"radio\" name=\"format\" value=\"png\" />png";
    document.getElementById("photo").style.fontWeight="bold";
    document.getElementById("photo").style.color="black";
    document.getElementById("all").removeAttribute("style");
    document.getElementById("audio").removeAttribute("style");
    document.getElementById("video").removeAttribute("style");
    document.getElementById("word").removeAttribute("style");
}
function showAudio(){
    document.getElementById("formatContent").innerHTML="<input type=\"hidden\" id=\"sort\" value=\"audio\" />\
                <input type=\"radio\" name=\"format\" value=\"all\" checked=\"checked\"/>全部 \
			    <input type=\"radio\" name=\"format\" value=\"mp3\" />mp3\
			    <input type=\"radio\" name=\"format\" value=\"wma\" />wma\
			    <input type=\"radio\" name=\"format\" value=\"other\" />其他";
    document.getElementById("audio").style.fontWeight="bold";
    document.getElementById("audio").style.color="black";
    document.getElementById("all").removeAttribute("style");
    document.getElementById("photo").removeAttribute("style");
    document.getElementById("video").removeAttribute("style");
    document.getElementById("word").removeAttribute("style");
}
function showVideo(){
    document.getElementById("formatContent").innerHTML="<input type=\"hidden\" id=\"sort\" value=\"video\" />\
                <input type=\"radio\" name=\"format\" value=\"all\" checked=\"checked\"/>全部 \
                <input type=\"radio\" name=\"format\" value=\"wmv\" />wmv\
                <input type=\"radio\" name=\"format\" value=\"avi\" />avi\
                <input type=\"radio\" name=\"format\" value=\"mp4\" />mp4\
                <input type=\"radio\" name=\"format\" value=\"3gp\" />3gp\
			    <input type=\"radio\" name=\"format\" value=\"rmvb\" />rmvb\
			    <input type=\"radio\" name=\"format\" value=\"other\" />其他";
    document.getElementById("video").style.fontWeight="bold";
    document.getElementById("video").style.color="black";
    document.getElementById("all").removeAttribute("style");
    document.getElementById("photo").removeAttribute("style");
    document.getElementById("audio").removeAttribute("style");
    document.getElementById("word").removeAttribute("style");
}
function showWord(){
    document.getElementById("formatContent").innerHTML="<input type=\"hidden\" id=\"sort\" value=\"word\" />\
                <input type=\"radio\" name=\"format\" value=\"all\" checked=\"checked\"/>全部 \
                <input type=\"radio\" name=\"format\" value=\"txt\" />txt\
			    <input type=\"radio\" name=\"format\" value=\"doc\" />doc\
			    <input type=\"radio\" name=\"format\" value=\"iso\" />iso\
			    <input type=\"radio\" name=\"format\" value=\"rar\" />rar\
			    <input type=\"radio\" name=\"format\" value=\"zip\" />zip\
			    <input type=\"radio\" name=\"format\" value=\"other\" />其他";
    document.getElementById("word").style.fontWeight="bold";
    document.getElementById("word").style.color="black";
    document.getElementById("all").removeAttribute("style");
    document.getElementById("photo").removeAttribute("style");
    document.getElementById("video").removeAttribute("style");
    document.getElementById("audio").removeAttribute("style");
}