Prevent Function Execution in Javascript and JQuery

Question

I have such a code block and when code finds an error attribute which is set to error, then it should prevent further execution, how can I prevent it from execution :

$(document).ready(function() {
 $("#SendMessage").click(function(e) {
 var elements = $("#contact-area input:text[error=error]").get();
 for (var i = 0; i < elements.length; i++) {
 if ($(elements[0]).attr("error") == "error") {
 alert("error found");
 // Stop execution of whole function
 }
 }
 $("#loaderImage").show();
 $("#statusMessage").text("Sending, Please wait...");
 window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
 });
})

And How can I do that with both JQuery and Javascript, maybe there is a pre-defined function to do that easily in JQuery.

Answer 1

$(document).ready(function() {
 var flag = false;
 $("#SendMessage").click(function(e) {
 var elements = $("#contact-area input:text[error=error]").get();
 for (var i = 0; i < elements.length; i++) {
 if ($(elements[0]).attr("error") == "error") {
 alert("error found");
 // Stop execution of whole function
 flag = true;
 break;
 }
 }
 if (!flag){
 $("#loaderImage").show();
 $("#statusMessage").text("Sending, Please wait...");
 window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
 }
 });
})

Would that accomplish what you need?

• Tarik: Well, actually I was expecting something like "what return does in C#", isn't there any function or keyword to prevent execution ? maybe stopExecution(); ?

Answer 2

just return; when the error is found

$(document).ready(function() {
 $("#SendMessage").click(function(e) {
 var elements = $("#contact-area input:text[error=error]").get();
 for (var i = 0; i < elements.length; i++) {
 if ($(elements[0]).attr("error") == "error") {
 alert("error found");
 return;
 }
 }
 $("#loaderImage").show();
 $("#statusMessage").text("Sending, Please wait...");
 window.setTimeout(function() { PageMethods.SendMessage(new Message().fullContent(), onSuccess(), onFailed()) }, "4000");
 });
})

• Jonathan Fingland: the alert popped up, but then continued?
• Tarik: @Yeah, I didn't know why ? Maybe some comparability issue with Mozilla ?
• Tarik: @crescen.. if I knew wtf is happening, I wouldn't be here asking this question :|
• Tarik: Alright people it now works, because there was another file referred to that page that why it wasn't working.