One day searching trough the internet for some information, I have found that is possible to open more URL from 1 button. this can be done using the following code:
Code:
<html>
<head>
<title></title>
</head>
<script language="javascript">
function whackOpen(){
var url = new Array(3);
url[0] = 'http://www.site1.com'
url[1] = 'http://www.site2.com'
url[2] = 'http://www.site3.com'
for (var i = 0; i < url.length; i++){
window.open(url[i],"","");
}
alert("I am so sorry for creaming your bandwidth")
}
</script>
<body>
<input type="button" onclick="whackOpen()" value="Open windows" />
</body>
</html>