function muestra_divpopup(capa,archivo,ancho,alto){
	//xInnerHtml('c1','')
	capabg='bg'+capa;
	
	w=xClientWidth();
	h=xClientHeight();
	h=Math.min(h,480);//h=2;
	//alert(capa+" "+w+" "+h);
	t=xScrollTop();
	myleft=Math.abs((w-ancho)/2);
	mytop=t+Math.abs((h-alto)/2);
	
	xLeft (capa,myleft);
	xTop (capa,mytop);	
	xWidth (capa,ancho + 6);
	xHeight (capa,alto + 6 + 20);
	
	xLeft (capabg,myleft);
	xTop (capabg,mytop);	
	xWidth (capabg,ancho + 6);
	xHeight (capabg,alto + 6 + 20);
	
	xWidth (capa+'_c1',ancho);
	xHeight (capa+'_c1',alto);
	xWidth ('cerrar'+capa,ancho);
	
	xInnerHtml(capa+'_c1',"<iframe width='"+ancho+"' name='divpopup_frame' height='"+alto+"' z-index='1' src='"+archivo+"' marginwidth='5' marginheight='5' scrolling='auto' hspace='0' vspace='0' frameborder='0' align='middle'></iframe>");
	
	
	xInnerHtml(capabg,"<iframe width='100%' name='bgdivpopup' height='100%' z-index='1' src='javascript:;' marginwidth='5' marginheight='5' scrolling='auto' hspace='0' vspace='0' frameborder='0' align='middle'></iframe>");
	xShow(capa);
	xShow(capabg);
}

function cerrar_divpopup(capa){
	capabg='bg'+capa;
	xHide(capa);
	xHide(capabg);
}