How to make javascript code to be embed into html button?
Question
I am a noob for learning javascripts
Here I have a javascripts code
I made a button named "click"
when you click the button
it will send a value xx=1 to x
if the value is match with the condition
then it will print "Y", otherwise it will be "N"
but it always cannot shows the messagebox.
<html>
<head>
<title>test</title>
<script language="javascript">
function jclass(xx)
{
var x=xx;
if x==1
alert("Y");
else
alert("N");
}
</script>
</head>
<head>
<h1><a href="javascript:jclass(1);">click</h1>
</head>
</html>
I have also tried other ways like this.
but it still cannot work.
<html>
<head>
<title>test</title>
<script language="javascript">
function jclass()
{
var x=1;
if x==1
alert("Y");
else
alert("N");
}
</script>
</head>
<head>
<h1><a href="javascript:jclass();">click</h1>
</head>
</html>
3 answers
solution1
0 2018-02-04 14:19:06
您必须使用括号 if(x == 1)
solution2
0 2018-02-04 14:22:06
You are missing the brackets for comparison,its not python:) You can check these type of errors in console and act upon exact statement You should also put curly braces even for a single line in a block or condition to avoid any legacy or formatting issues when running code
Happy Programming
<html> <head><title>test</title> <script language="javascript"> function jclass(xx) { var x=xx; if (x==1) { alert("Y"); } else { alert("N"); } } </script> </head> <head> <h1><a href="javascript:jclass(1);">click</h1> </head> </html>solution3
0 ACCPTED 2018-02-04 14:24:14
You have syntax error in if condition. The basic if...else syntax requires condition inside parenthesis after if .
function jclass(xx){ var x=xx; if (x==1) alert("Y"); else alert("N"); }
<h1><a href="javascript:jclass(1);">click</h1>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.