function getHotWord(words, len) {
	var n = 0;
    for (var i = 0; i < len; i++) {
        n = Math.floor(Math.random() * words.length);
        if (n > words.length - 1) {
            return;
        }
        if (words[n]){
	        document.write("<a href=\"/search/search.do?keyword="+ encodeURI(words[n]) + "&t=a\">" + words[n] + "</a>&nbsp;&nbsp;");
        }
        words.splice(n, 1);
    }
}