如何实现右下角弹出的窗口是指定的网页

<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<script>
var oPopup = window.createPopup(); 
var popTop=50; 
function popmsg(msgstr){ 
var winstr="<table style=\"border: 1 solid #6D93C8\" width=\"241\" height=\"172\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" >"; 
winstr+="<tr><td height=\"30\"> </td></tr><tr><td align=\"center\"><table width=\"90%\" height=\"110\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">"; 
winstr+="<tr><td valign=\"top\" style=\"font-size:12px; color: #6D93C8; face: Tahoma\">"+msgstr+"</td></tr></table></td></tr></table>"; 
oPopup.document.body.innerHTML = winstr; 
popshow(); 
}
function popshow(){ 
window.status=popTop; 
if(popTop>1720){ 
clearTimeout(mytime); 
oPopup.hide(); 
return; 
}else if(popTop>1520&&popTop<1720){ 
oPopup.show(screen.width-250,screen.height,241,1720-popTop); 
}else if(popTop>1500&&popTop<1520){ 
oPopup.show(screen.width-250,screen.height+(popTop-1720),241,172); 
}else if(popTop<180){ 
oPopup.show(screen.width-250,screen.height,241,popTop); 
}else if(popTop<220){ 
oPopup.show(screen.width-250,screen.height-popTop,241,172); 
} 
popTop+=10; 
var mytime=setTimeout("popshow();",50); 
}
 
popmsg("http://www.baidu.com"); 
</script>
</html>上面弹出的是一个链接，怎么才能弹出百度的首页呢？