function start() { 
var _loc = "it.php";
var _name= "newWin";
var _features="fullscreen";
var _replace=true;
window.open(_loc,_name,_features,_replace);
}

function openWin() {
var _loc = "it.php?r=1";
window.open(_loc,'newWin','width=100%,height=100%');
}