js整合数字为价格的格式

js调整数字为价格的格式
例子：
比如输入123456会自动调整为123,456的格式。

<script language="javascript" type="text/javascript" >function isInputedNum (txtId) {if (!event.shiftKey) {if (!((event.keyCode >= 48 && event.keyCode <= 57) || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 46 || (event.keyCode >= 96 && event.keyCode <= 105) || (event.keyCode >= 37 && event.keyCode <= 40))) {//alert(event.keyCode);event.returnValue = false;return false;}if (event.keyCode != 9) {if (txtId.value == "0") {txtId.value = "";}}return true;} else {event.returnValue = false;return false;}}/** * remove comar from a number String  */function removeComarValue(txtId) {if(txtId.readOnly == true)return;var txt = removeComar(txtId.value);txtId.value = txt;}/** * remove comar from a number String  */function removeComar(txtNum) {var numStr = txtNum;var indx = numStr.indexOf(",");if (indx != -1) {numStr = numStr.replace(",", "");numStr = removeComar(numStr);}return numStr;}/** * add comar to a number String  */function resetComarValue(txtId) {if(txtId.readOnly == true) return;var value = txtId.value.replace(/^0+/g, '');if (value == '') value = '0';var txt = resetComar(value);txtId.value = txt;}/** * add comar to a number String  */function resetComar(txtNum) {txtNum = removeComar(txtNum);if (txtNum.length <= 3) {return txtNum;}var threeOnes = new Array(0);var last = txtNum.length;var first = last - 3;var arrayIndx = 0;while (first >= 0) {var txtNumStr = txtNum.substring(first, last);threeOnes[arrayIndx] = txtNum.substring(first, last);arrayIndx++;last = first;first = last - 3;if (first < 0 && last > 0) {first = 0;}}var txtNumCopy = "";for (var i = threeOnes.length - 1; i >= 0; i--) {if (txtNumCopy == "") {txtNumCopy = threeOnes[i];} else {txtNumCopy = txtNumCopy + "," + threeOnes[i];}}if(txtNumCopy.charAt(0) == '-') {if(txtNumCopy.charAt(1) == ',') {txtNumCopy = "-" + txtNumCopy.substring(2);}}return txtNumCopy;}</script><input type="text" id="price" name="price" maxlength="11" onkeydown="return isInputedNum(this)" onfocus="removeComarValue(this)" onblur="resetComarValue(this)" style="text-align: right;" />