网页右下角弹出图片代码问题

我写了下面的代码，可以执行，没有问题：

<SCRIPT Language=Javascript>
<!--
var oPopup = window.createPopup();
var popTop=40;
function popmsg(msgstr){
var winstr=<table width=\241\ height=\180\ border=\0\ cellpadding=\0\ cellspacing=\0\>;
winstr+=<tr><td align=\center\><table width=\90%\ height=\180\ border=\0\ cellpadding=\0\ cellspacing=\0\>;
winstr+=<tr><td align=\center\><table width=\90%\ height=\180\ border=\0\ cellpadding=\0\ cellspacing=\0\>;
winstr+=<tr><td valign=\top\ style=\font-size:12px;\><a href=a.html>+msgstr+</a></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-241,screen.height,241,1720-popTop);
}else if(popTop>1500&&popTop<1520){
oPopup.show(screen.width-241,screen.height+(popTop-1720),241,172);
}else if(popTop<172){
oPopup.show(screen.width-241,screen.height,241,popTop);
}else if(popTop<220){
oPopup.show(screen.width-241,screen.height-popTop,241,172);
}
popTop+=10;
var mytime=setTimeout(popshow();,20);
}
popmsg(<img border='0' src='iloveu.jpg' width='240' height='170' onClick=\parent.location.href='';\>);
-->
</SCRIPT>