写了这么久的web程序，还没好好整理过javascript方面的东西，每次要用到什么东西都是满世界的找，在曾经的项目里，在google里到处搜，下次还是做好一个存放一个，从这里开始整理吧.

1、替换字符串中 所有字符
<script type="text/javascript">
function strReplace(search, replace, str) {
 var regex = new RegExp(search, "g");
 return str.replace(regex, replace);
}
   var aa = new Array();
   aa.push("，","。","！","、","？","；");
   var aa1 = new Array();
   aa1.push(",",".","!",",","?",";");    
   var str = "你好，大家都在忙什么？有空来玩，再见。"
   for(var i=0; i<aa.length; i++){
       var ostr = ""+aa[i];
       var nstr = ""+aa1[i];
       str = strReplace(ostr,nstr,str);
   }
   document.write(str);
</script>