document.onclick=function(e){
	e = e || event;
	var target = e.target || e.srcElement;

	if(target.tagName == 'a' && target.className == 'form') {
		popup(target);
		return false;
	}
}

function popup(e){
	var screen_width  = screen.availWidth;
	var screen_height = screen.availHeight;

	var my_width  = 600;
	var my_height = 530;

	var my_left   = (screen_width-my_width)/2;
	var my_top    = (screen_height-my_height)/2;

	var parameters = 'width='+my_width+',height='+my_height+',top='+my_top+',left='+my_left+',scrollbars=1';

	var w=window.open(e.href,'',parameters);
	w.focus();
}