function popS(url, name, width, height) {
    var winLeft = (screen.width - width) / 2 ;
    var winTop = (screen.height - height) / 2 ;
    param = 'height=' + height + ', width=' + width + ', top=' + winTop + ', left=' + winLeft ;
	win = window.open(url, name, param) ;
  	win.window.focus() ;
}

function cv(id) {
	section = "section" + id ;
	
	if (document.getElementById) {
		if (document.getElementById(section).style.display == "none")  document.getElementById(section).style.display = "block" ;
		else														   document.getElementById(section).style.display = "none" ;
	}
	else if (document.all) {
		if (document.all[section].style.display == "none")  document.all[section].style.display = "block" ;
		else												document.all[section].style.display = "none" ;
	}
	else if (document.layers) {
		if (document.layers[section].display == "none")	 document.layers[section].display = "block" ;
		else											 document.layers[section].display = "none" ;
	}
}