function pop(url){
	if(screen.availHeight){
		h = screen.availHeight-150;
		l = screen.availWidth/2 - (580/2)
	}else{
		h = 300;
		l = 0;
	}
	normal = window.open(url,"normal","width=580,height="+h+",location=yes,menubar=yes,scrollbars=yes");
	if(normal.moveTo){
		normal.moveTo(l,0);
	}
	normal.focus();
}