var oPopup = window.createPopup();
var popTop=0;
function popmsg(msgstr){

var winstr="<div style='height:172;width:241;overflow:auto;'><table style=\"border: 1 solid  #6D93C8\"  width=\"241\" height=\"172\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"   >";
winstr+="<tr><td align=\"center\"  valign=\"top\"><table width=\"90%\" height=\"110\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\">";
winstr+="<tr><td valign=\"top\" style=\"font-size:12px; color: #6D93C8; face: Tahoma;line-height:20px;\" >"+msgstr+"</td></tr></table></td></tr></table></div>";
oPopup.document.body.innerHTML = winstr;
popshow();
}
function popshow(){ 
    if(popTop>172){
        clearTimeout(mytime); 
        oPopup.hide();
        return;
    }      
    else{
    oPopup.show(screen.width-250,screen.height-172,241,172,document.body);
    }
     
    popTop=popTop+50;       
    var mytime=setTimeout("popshow();",50); 
}