function subForm(bookNum) {
	if (bookNum=='viewCart') {
		if (document.getElementById("viewCart")) {
			var fmNum=document.getElementById("viewCart");
			fmNum.submit();
		}
	}
	else {
		var fmNum=document.getElementById("book"+bookNum);
		fmNum.submit();
	}	
}
function switchTab(tabNum) {
	for (var i=1;i < 4; i++) {
	chgVal=document.getElementById('taba'+i);
	var getInner=chgVal.innerHTML;
	var getInnerNew=getInner.replace('_on.gif','_off.gif');
	 	
		chgVal.innerHTML=getInnerNew;
	document.getElementById('contentTab'+i).style.display='none';
	}
	chgVal=document.getElementById('taba'+tabNum);
	var getInner=chgVal.innerHTML;
	var getInnerNew=getInner.replace('_off.gif','_on.gif');

	chgVal.innerHTML=getInnerNew;
	document.getElementById('contentTab'+tabNum).style.display='block';
}

function openPopUp(link)
{ 
    windowOptions = "width=980,height=900,scrollbars=yes,resizable=yes";
    openNewWindow(link, '', windowOptions ,"Cover");
}

function openNewWindow(url, parms, windowOptions, descr)
{  
    urlPrefix = url;
    if (parms != ""){
      urlPrefix = urlPrefix + parms;
    }
    popWin = window.open(urlPrefix,descr,windowOptions);
    popWin.focus();
}


   

   function writeCopyright()
   {
		var COPYRIGHT = "&copy;";
      document.write(COPYRIGHT, new Date().getFullYear());
   }