How can I change global variables in javascript? -
my html page displays button calls function when clicked. checked make sure button works displaying message when clicked , worked. created function change global varible when click button on html page show value of varibles varibles have not changed value set them using function. find problem in code below?
var = 5; var b = 16; var c = 27; function reset(){ = 0; b = 0; c = 0; }
my html code call function:
<!doctype html> <html> <center> <script type="text/javascript" src="game.js" > </script> <form> <input type="button" value="reset variables" style="width:250px;height:50px" onclick="reset()" > </form> </html>
javascript code show variables:
function display(){ document.write("a equal " + + "<br/>"); document.write("b equal " + b + "<br/>"); document.write("c equal " + c ); }
html display variables
<!doctype html> <html> <center> <script type="text/javascript" src="game.js" > </script> <form> <input type="button" value="show variables" style="width:250px;height:50px" onclick="display()" > </form> </html>
change function name reset_vars or else. reset() in-built dom function used resetting forms.
http://www.w3schools.com/jsref/met_form_reset.asp
there won't conflict when global variable used inside function unless local variable defined. in such case, use window.variable_name access global variable.
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