1.sleep()

function sleep(numberMillis) { 
    	   var now = new Date();
    	   var exitTime = now.getTime() + numberMillis;  
    	   while (true) { 
    	       now = new Date(); 
    	       if (now.getTime() > exitTime)    return;
    	    }
}

作用是跟setTimeout一样的，都是等待多少毫秒执行。numberMillis表示多少毫秒

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2.removeHTMLTag()

 function removeHTMLTag(str) {
            str = str.replace(/<\/?[^>]*>/g,''); //去除HTML tag
            str = str.replace(/[ | ]*\n/g,'\n'); //去除行尾空白
            str = str.replace(/\n[\s| | ]*\r/g,'\n'); //去除多余空行
            str=str.replace(/&nbsp;/ig,'');//去掉&nbsp;
            return str;
 }

去除html标签。str为要去掉的字符串