About variables

圣光使者

var a;
function CheckNewMsg ()
{
a = '1';
}
alert (a);
CheckNewMsg () is called when the page is loaded to assign a, how can the value of a be saved outside the function?

liteding

Just use a as a global variable!

圣光使者

How to define global variables in JavaScript?

dicky12468

You have defined global variables like this

处了不会任务

There is a problem as you said?

phn_nerve

You may be calling in the wrong order.