<script language=javascript> String.prototype.dbc2sbc = function () 

return this.replace(/[\uff01-\uff5e]/g,function(a){return String.fromCharCode(a.charCodeAt(0)-65248);}).replace(/\u3000/g," "); 
} String.prototype.dbc2sbc1 = function () 

return this.replace(/[a-zA-Z0-9]/g,function(a){return String.fromCharCode(a.charCodeAt(0)+65248);}).replace(" "," "); 
}
alert("aaa 123我们都是好朋友".dbc2sbc1()); 
</script>