js 中将多个逗号替换为一个逗号的代码
<scriptlanguage="javascript">
varstr="asdfk,asdf34,,,,,,5345,,,,";
str=str.replace(newRegExp(',+',"gm"),',');
alert(str);
</script>
比较不错的一个代码：
functiondostr(str){
str=trim(str);
varstrarry=unique(str.split(","));
str=strarry.join(",");
str=str.replace(/，/ig,",");
str=str.replace(/[^0-9,]*/ig,"");
str=str.replace(newRegExp(',+',"gm"),',');
if(str.substr(0,1)==',')str=str.substr(1);
varreg=/,$/gi;
str=str.replace(reg,"");
returnstr;
}