Syntax
void(expression)
void expression
The void operator is used to evaluate an expression without returning a value.
This operator returns undefined and is commonly used in place of the onClick event handler.
The following example uses the void Operator to Call a Function.
<html>
<head>
<title>Examples of the void Operator</title>
<script language="JavaScript">
<!--
function myFunc(){
alert("You clicked the link!");
}
-->
</script>
</head>
<body>
<A HREF="javascript:void(myFunc())">Click here to call the function</A>
</body>
</html>