在javascript中将GBK转UTF-8的实例代码

<script type="text/javascript">  
var easyUTF8 = function(gbk){  
    if(!gbk){return '';}  
    var utf8 = [];  
    for(var i=0;i<gbk.length;i++){  
        var s_str = gbk.charAt(i);  
        if(!(/^%u/i.test(escape(s_str)))){utf8.push(s_str);continue;}  
        var s_char = gbk.charCodeAt(i);  
        var b_char = s_char.toString(2).split('');  
        var c_char = (b_char.length==15)?[0].concat(b_char):b_char;  
        var a_b =[];  
        a_b[0] = '1110'+c_char.splice(0,4).join('');  
        a_b[1] = '10'+c_char.splice(0,6).join('');  
        a_b[2] = '10'+c_char.splice(0,6).join('');  
        for(var n=0;n<a_b.length;n++){  
            utf8.push('%'+parseInt(a_b[n],2).toString(16).toUpperCase());  
        }  
    }  
    return utf8.join('');  
};  
document.write(easyUTF8('我爱编程学习网！'));  
</script>