function popup(str) {
		x = (screen.availHeight/2)-200
		y = (screen.availWidth/2)-275
        searchWin = window.open(str,'15','scrollbars=yes,resizable=no,width=600,height=440,top='+x+',left='+y+',status=no,location=no,toolbar=no');
		if(!searchWin.opener) searchWin.opener=self;	
		if(searchWin.focus!=null) searchWin.focus();

}