javascript - How to get return value on onLoad event -

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<html> <head><title>body onload example</title> </head> <body onload="sum(2,3)"> welcome page </body> </html>  function sum(var x,var y){  var z=x+y;  return z;  }

my problem want store return value of function sum in variable can use later

make global : 

var z;  function sum(x,y) { z=x+y; }

now should available anywhere else in script.

i believe trying do:

script :

var z;  function sum(x,y) {     z = x + y;     document.getelementbyid("mysum").innertext = z; }

html:

<body onload="sum(2,3)">     welcome page value of      <p>sum : <span id="mysum"></span></p> </body>

demo


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