var obj;
if (window.opener)  obj = window.opener.top; 

function parentOpen(page_url) { 
 if (obj && !obj.closed) {
  obj.location.href = page_url; 
  obj.focus(); 
 } else {
  obj = window.open(page_url,'some_obj');
 }
}
// --> 
function sWin(tit,w,h,d){
	GetId('btnCerrarVtna2').style.display='';
	var oVtna = GetId("sVentana2");	
	GetId("TitVna2").innerHTML=tit;
	oVtna.style.width=w+'px';
	oVtna.style.height=h+'px';
	//centet top window
	scroll_top=((ie)? truebody().scrollTop : window.pageYOffset)+100;
	if (navegador=="Microsoft Internet Explorer"){
			oVtna.style.top=scroll_top;
			oVtna.style.left=(document.body.offsetWidth/2)-(w/2);
	}else{
		
		oVtna.style.top=scroll_top+'px';
		oVtna.style.left='30%';
		}
		var objDiv = GetId("sOverlay2")
	objDiv.style.display = "";
	if (navegador=="Microsoft Internet Explorer"){
		objDiv.style.height=document.documentElement.clientHeight*6;
		}else{
			objDiv.style.height=3* window.innerHeight+'px';
			}
	oVtna.style.display = "";
}
function OcultarVtna2(){
	var objDiv = GetId("sVentana2");
	objDiv.style.display = "none";
	var objDiv = GetId("sOverlay2");
	objDiv.style.display = "none";
}