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xmlhttp = new XMLHttpRequest();
function getData(dataSource, divID){
var obj = document.getElementById(divID);
xmlhttp.open("GET", dataSource);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}
function ocultar(divID){
document.getElementById(divID).innerHTML="";
}
function enviarform (formulario){
serverPage = "validator.php?sstring=" + thevalue;
objID = "messagebox";
var obj = document.getElementById(objID);
xmlhttp.open("GET", serverPage);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}
//Functions to submit a form.
function getformvalues (fobj, valfunc){
var str = "";
aok = true;
var val;
//Run through a list of all objects contained within the form.
for(var i = 0; i < fobj.elements.length; i++){
if(valfunc) {
if (aok == true){
val = valfunc (fobj.elements[i].value,fobj.elements[i].name);
if (val == false){
aok = false;
}
}
}
str += fobj.elements[i].name + "=" + escape(fobj.elements[i].value) + "&";
}
//Then return the string values.
return str;
}
function submitform (theform, serverPage, objID, valfunc){
var file = serverPage;
var str = getformvalues(theform,valfunc);
//If the validation is ok.
if (aok == true){
obj = document.getElementById(objID);
processajax (serverPage, obj, "post", str);
}
}
function processajax (serverPage, obj, getOrPost, str){
//Get an XMLHttpRequest object for use.
xmlhttp = getxmlhttp ();
if (getOrPost == "get"){
xmlhttp.open("GET", serverPage);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}
else {
xmlhttp.open("POST", serverPage, true);
xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(str);
}
}
//Function to create an XMLHttp Object.
function getxmlhttp (){
//Create a boolean variable to check for a valid Microsoft active x instance.
var xmlhttp = false;
//Check if we are using internet explorer.
try {
//If the javascript version is greater than 5.
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
//If not, then use the older active x object.
try {
//If we are using internet explorer.
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
//Else we must be using a non-internet explorer browser.
xmlhttp = false;
}
}
// If not using IE, create a
// JavaScript instance of the object.
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
xmlhttp = new XMLHttpRequest();
}
return xmlhttp;
}
function recalcular(campo,texto){
if(verificarNumero(document.getElementById(campo))){
calcular();
}
else {
alert("Verificar que se ingresen solo numeros");
}
}
function calcular(){
var ef=0; var ch=0; var vo=0; var ot=0;var total=0;
ef = parseFloat(document.getElementById("ef").value);
ch = parseFloat(document.getElementById("ch").value);
vo = parseFloat(document.getElementById("vo").value);
ot = parseFloat(document.getElementById("ot").value);
pago = ef + ch + vo + ot;
total = parseFloat(document.getElementById("to").value);
vuelto = pago-total;
if (vuelto<0){
vuelto=0;
document.getElementById("boton").innerHTML = "";
} else {
ht = "<input type=\"submit\" value=\"Guardar\" />"
document.getElementById("boton").innerHTML = ht;
}
if (typeof vuelto != "number"){
document.getElementById("boton").innerHTML = "";
alert("No se permiten letras, solo numeros");
}
document.getElementById("vu").value = vuelto;
}
function verificarNumero(cadena){
/*devuelve verdadero si está dentro de los caracteres permitidos */
var caracteresPermitidos ="0123456789.,-";
if(!cadena){
alert("No es una cadena");
return false;
} else {
var str = cadena.value;
}
for(index=0;index<str.length;index++){
myChar = str.charAt(index);
if(caracteresPermitidos.indexOf(myChar)==-1){
return false;
}
return true;
}
}
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