function openWindow(parametros, ancho, alto) {
		derecha=(screen.width-ancho)/2;
		arriba=(screen.height-alto)/2;
		string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
			
		fin=window.open('popup.php?'+parametros,"ventana", string);
	}
function openWindow2(pgn, parametros, ancho, alto, scrollbars, resizable) {
	derecha=(screen.width-ancho)/2;
	arriba=(screen.height-alto)/2;
	
	if(resizable==true)
		resizable = 1;
	else
		resizable = 0;
		
	if(scrollbars==true)
		scrollbars = 1;
	else
		scrollbars = 0;
	
	string="toolbar=0,scrollbars="+scrollbars+",location=0,statusbar=0,menubar=0,resizable="+resizable+",width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
		
	fin=window.open(pgn+'?'+parametros,"ventana", string);
}

function dimensionar(ancho, alto, centro) {
	if(centro==true) {
		derecha=(screen.width-ancho)/2;
		arriba=(screen.height-alto)/2;
		window.moveTo(derecha,arriba);
	}
	
	window.resizeTo(ancho,alto);
}

function darFoco(id) {
	id = document.getElementById(id);
	if(id)  {
		id.focus();
	} else {
		self.focus();
	}
}

function doPost(frm, params) {
	var frm = document.getElementById(frm);
	if(frm) {
		frm.action = params;
		frm.submit();
	}
}

function enviar()
 {
 var valor = document.form2.marcas.options[document.form2.marcas.selectedIndex].value; 
 //alert (valor);
 window.location = 'categorias.php?idcat='+valor;
 
 
 }
 /// cookies

function openWin(pgn,ancho, alto, scrollbars, resizable) {
	derecha=(screen.width-ancho)/2;
	arriba=(screen.height-alto)/2;
	
	if(resizable==true)
		resizable = 1;
	else
		resizable = 0;
		
	if(scrollbars==true)
		scrollbars = 1;
	else
		scrollbars = 0;
	
	string="toolbar=0,scrollbars="+scrollbars+",location=0,statusbar=0,menubar=0,resizable="+resizable+",width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
		
	fin=window.open(pgn,"ventana", string);
}

function openWin2(m91){
	
var pag="popPort.php?imgID="+m91;
window.open(pag,m91,'toolbar=0,location=0,directories=0,status=0,menubar=0,resizable=0,scrollbars=1,width=520,height=400');	

}