Very good people ... I need a little help ... I have a form made by which the user must enter a name, ID, sex..by which then it is saved to a database ... I have to do a function in javascript to check if the ID was already entered .. If this ID was already saved when I click on the "save" button I see an error sign and do not let me save ... greetings and thanks for your time ..I am working with mongodb and nodejs
Look something like this with Jquery
function Get_Campo(DNI){
var salida="";
$.ajax({
type:"POST",
url:"<?=$_SERVER["PHP_SELF"]?>",
data:({
funcion:"Validar_DNI",
dni:DNI
}),
dataType:"html",
async:false,
success:function(msg){
salida=msg;
return salida;
}
});
return salida;
}
var G=Get_Campo($("#DNI").val());
if(G=="1") alert("Existe");
This call <?=$_SERVER["PHP_SELF"]?> refers to the current file in PHP, it can be replaced by the file where is the connection to the BD of your validator