小写转换大写（人民币）

function convert(){
    var val = lower.val();
    var arrnum = val.split("");
    var arrcapital = "零壹贰叁肆伍陆柒捌玖".split("");
    var arrlevel = ["元","十","百","千","万","十","百","千","亿","十","百","千"];
    var rt = "";
    for(var i=arrnum.length-1,l=arrnum.length;i>-1;i--){
        var tmp = arrnum[l-i-1];
        rt += (arrcapital[tmp] + arrlevel[i]);
    }
    return rt;
}