asp.net js實作金額格式化_javascript技巧

//======檢查輸入的是否為數字
function check() {
    if (!((window.event.keyCode >= 48 && window.event.keyCode         window.event.keyCode = 0
    }
}
//======格式化文字方塊的金額
function run(obj) {
    var objvalue = obj.value.replace(/[,]/g, ""),
        objlength = objvalue.length,
        dtmp = objvalue.indexOf("."),
        neg = objvalue.indexOf("-");
    var inttmp = 0,
        floattmp = -1;
    if (dtmp != -1) {
        inttmp = dtmp == 0 ? "0" : new String(objvalue).substring(0, dtmp);
        floattmp = new String(objvalue).substring(dtmp 1, objlength 1);
        floattmp = floattmp.replace(/[^0-9]/g, "");
    }
    else {
        inttmp = objvalue;
    }
    if (neg == 0) {
        inttmp = inttmp.replace(/[-]/g, "");
    }
    inttmp = inttmp.replace(/[^0-9]/g, "");
    var tmp = "", str = "0000";
    for (; inttmp.length > 3; ) {
        var temp = new String(inttmp / 1000);
        if (temp.indexOf(".") == -1) {
            tmp = ",000" tmp;
            inttmp = temp;
        }
        else {
            var le = 新 String(temp).split(".")[1].length;
            tmp = "," new String(temp).split(".")[1] str.substring(0, 3 - le) tmp;
            inttmp = 新 String(temp).split(".")[0];
        }
    }
    inttmp = inttmp tmp;
    obj.value = neg == 0 ? "-" inttmp runing(floattmp) : inttmp runing(floattmp);
}
//======整理小數部分​​
function runing(val) {
    if (val != "-1" && val != "") {
        var valvalue = 0 "." val;
        if (val.length >= 2) {
            valvalue = parseFloat(valvalue).toFixed(2);
        }
        var temp = "." valvalue.split(".")[1];
        return temp;
    }
    else if (val != "0" && val == "") {
        return ".";
    }
    else {
        return "";
    }
}