js格式化金额(格式化文本框的金额)

//======检查输入的是否为数字
function check() {
if (!((window.event.keyCode >= 48 && window.event.keyCode <= 57) || window.event.keyCode == 46 || window.event.keyCode == 45)) {
window.event.keyCode = 0
} // www.jb200.com
}
//======格式化文本框的金额
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 = new String(temp).split(".")[1].length;
tmp = "," + new String(temp).split(".")[1] + str.substring(0, 3 - le) + tmp;
inttmp = new String(temp).split(".")[0];
}
}
inttmp = inttmp + tmp;
obj.value = neg == 0 ? "-" + inttmp + runing(floattmp) : inttmp + runing(floattmp);
}
//======整理小数部分
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 "";
}
}