function ver(pag,w,h){
	Navig=navigator.appName
	if(Navig=='Netscape'){
		var y=document.body.scrollHeight
		var x=document.body.scrollWidth
	}else{
		var y= document.body.clientHeight; 
		var x=document.body.clientWidth
	}
	var l=(x/2)-(w/2)
	var t=(y/2)-(h/2)
	window.open(pag,'','toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=no,scrollbars=no,width='+w+',height='+h+',left='+l+',top='+t);
}