function NewChat(url)
{
var width = 700;
var height = 475;
var left = parseInt((screen.availWidth/2) - (width/2));
var top = parseInt((screen.availHeight/2) - (height/2));
var chatWindow;
chatWindow=window.open(url,'chatWindow','left=' + left + ',top=' + top + ',width=700,height=475,location=0,menubar=0,resizable=1,scrollbars=1');
chatWindow.focus();
}