function isInteger(s){
 for(i=0;i<s.length;i++){
  var c=s.charAt(i);
  if(c<"0"||c>"9"){return false;}
 }
 return true;
}

function formcheck(ubd){
 for(j=0;j<=ubd;j++){
  if(!isInteger(document.getElementById("qty" + j).value)){
   alert("Please enter only digits (1, 2, 3, etc.) for your quantity.");
   document.getElementById("qty" + j).focus();
   return false;
  }
 }
 return true;
}

function goImgWin(myImage,myWidth,myHeight) {
myHeight += 24;
myWidth += 24;
TheImgWin=window.open(myImage,'image','height=' + myHeight + ',width=' + myWidth + ',toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no');
TheImgWin.resizeTo(myWidth+2,myHeight+30);
TheImgWin.focus();
}