Javascript alert based on prompt value
Question
I am trying to make a script in which a prompt window will pop up asking a question, and based on what the answer in it is, an alert box will pop up saying that the answer is valid or invalid. In my code, my prompt box works, but my alert box didn't. Can someone help me solve this problem please? Thank you so so much!!
<!DOCTYPE HTML>
<html>
<script type="text/javascript">
var City=prompt("Enter your city", "City");
function checkName(){
var validLetters=/^[a-z]+$/i;
if(validLetters.test(City))
alert("Your input is accepted!");
else
alert("Your input is invalid!");
}
</script>
2 answers
solution1
1 ACCPTED 2016-05-24 04:14:54
Invoke the function checkName with argument City or you could use global-variable .
You are not calling the function in your script to test the value of prompt
var City = prompt("Enter your city", "City"); checkName(City); function checkName(City) { var validLetters = /^[az]+$/i; if (validLetters.test(City)) alert("Your input is accepted!"); else alert("Your input is invalid!"); }
solution2
1 2016-05-24 04:23:24
You are not calling your fucntion checkName . call this function after prompt .
var City = prompt("Enter your city", "City");
checkName(City); // function to be called
function checkName(City) {
var validLetters = /^[a-z]+$/i;
if (validLetters.test(City))
alert("Your input is accepted!");
else
alert("Your input is invalid!");
}
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