JavaScript - If Popups Blocked Script

<script language="javascript" type="text/javascript">
<!--
function popitup(url) {
	newwindow=window.open(url,'name','height=200,width=150');
	if (window.focus) {newwindow.focus()}
	return false;
}

// -->
</script>
</head>
<div>
<img src="IMAGES/BidsCouponSmall-text.png" />
<br />
<br />
<a href="printcoupon.htm" target="coupon"
onclick="window.open('printcoupon.htm','coupon','height=500,
 width=400,toolbar=no,directories=no,status=no,
 menubar=no,scrollbars=no,resizable=no'); return false;"
>Click HERE To Print</a>
	<br />
</div>

<script type="text/javascript" src="script.js ?param1=val1&param2=val2&etc ">

<script type="text/javascript">
function enlarge(imageNum)
{
var numToString = "";
if(parseInt(imageNum) < 10){
numToString = "0" + imageNum;
}
else
{
numToString = imageNum + "";
}
window.open("images/LgScreenshot"+numToString+".jpg","Screenshot "+imageNum,"status=0,height=675,width=900,resizable=0");
}
</script>

<script type="text/javascript">var cnnIsHomePage = true;</script>

<script type="text/javascript">
     var cnnIsHomePage = true;
</script>

function doattack(baseatk, wepatk, wepcritmax, oppdef, oppdeffactor, oppextradefmax, opphealth, oppname) 	{ 
           var OpponentHealth = opphealth;
           var OpponentName = oppname;
	   var BaseATK = baseatk;
	   var WeaponATK = wepatk;
	   var WeaponCriticalMax = "100+Math.floor(Math.random()*wepcritmax+1)";
           var ActualWeaponATK = "WeaponATK * WeaponCriticalMax / 100";
	   var OpponentDEF = oppdef; 
           var DEFfactor = oppdeffactor; //defensefactor: used to multiply preoppdef to calculate actualoppdef so more in number the better rmbr that deffactor must be less than 1 
           var DEFCriticalMax = "100+Math.floor(Math.random()*oppextradefmax+1)"; 
           var PreOpponentDEF = "OpponentDEF * DEFCriticalMax / 100";
	   var ActualOpponentDEF = "PreOpponentDEF * DEFfactor";
           var DamageDone = "BaseATK + ActualWeaponATK";
           var OVRDamageDone = "DamageDone * ActualOpponentDEF / 100";
           document.write("You just inflicted " + OVRDamageDone + " damage to " + OpponentName + "!" + "<br>");
           var NewOpponentHealth = "OpponentHealth - OVRDamageDone";
	   if (NewOpponentHealth < 0) 
             {
	     document.write(OpponentName + " is dead!" + "<br>"); 
   	     break;
             }
           else 
             { 
             doattack(BaseATK, WeaponATK, WeaponCriticalMax, OpponentDEF, DEFfactor, DEFCriticalMax, NewOpponentHealth, OpponentName);
             }
       } 
	doattack(5, 50, 25, 6, 0.22, 10, 200, RedBabyDragon);