如何添加此javascript的链接？

Question

这是完整的javascript，用于阅读更多链接的帖子摘要 -

<script type='text/javascript'>
//<![CDATA[
function removeHtmlTag(strx,chop){
    if(strx.indexOf("<")!=-1)
    {
        var s = strx.split("<");
        for(var i=0;i<s.length;i++){
            if(s[i].indexOf(">")!=-1){
                s[i] = s[i].substring(s[i].indexOf(">")+1,s[i].length);
            }
        }
        strx = s.join("");
    }
    chop = (chop < strx.length-1) ? chop : strx.length-2;
    while(strx.charAt(chop-1)!=' ' && strx.indexOf(' ',chop)!=-1) chop++;
    strx = strx.substring(0,chop-1);
    return strx+'...';
}

function createSummaryAndThumb(pID){
    var div = document.getElementById(pID);
    var imgtag = "";
    var img = div.getElementsByTagName("img");
    var summ = summary_noimg;
       if(thumbnail_mode == "yes") {
    if(img.length>=1) {
        imgtag = '<span style="float:left; padding-right:10px;"><img src="'+img[0].src+'" width="'+img_thumb_width+'px" height="'+img_thumb_height+'px"/></span>';
        summ = summary_img;
    }
    }
    的 var summary = imgtag + '<div>' + removeHtmlTag(div.innerHTML,summ) + '</div>';
    div.innerHTML = summary;
}
//]]>
</script>

在var摘要中，我尝试以这种方式添加<a href='http://xyz.com'>read more</a>之类的链接

var summary = imgtag + '<div>' + removeHtmlTag(div.innerHTML,summ) + '<a href='http://xyz.com'>' + '<span>' + readmore + '</span>' + '</a>' + '</div>';

但这不起作用。我知道一点点javascript。请帮帮我。