//Global Variable Definition
var MsgPopupBlocker = "Your popup blocker seems to be blocking the popup Windows. Please add this site to the web site allowed to open popup and try again.";
var IEC_Win=null;
var IEC_PubIDs = "";

window.onunload = function(){ if(IEC_Win != null && !IEC_Win.closed) IEC_Win.close(); }; //closes the popup window if the parent window is closed
function AddToCart(item_code,item_title,item_category,item_doi,author_names,item_issue_num,item_volume_num,item_info_url,item_pdf_url,starting_page_num,ending_page_num,total_page_num,journal_title)
{
//Encode the Author Names 
    var encodedInputString=author_names.replace("+", "%2B");
        encodedInputString=encodedInputString.replace("/", "%2F");
        author_names=escape(encodedInputString)+'|||'+UrlEncode(author_names);
        //Encode the Item Title
        encodedInputString=item_title.replace("+", "%2B");
        encodedInputString=encodedInputString.replace("/", "%2F");
        item_title=escape(encodedInputString)+'|||'+UrlEncode(item_title);
    
//    //Encode the Journal Title
        encodedInputString=journal_title.replace("+", "%2B");
        encodedInputString=encodedInputString.replace("/", "%2F");
        journal_title=escape(encodedInputString)+'|||'+UrlEncode(journal_title);

    //Open the popup window
     var IEC_WinW = 550;
    var IEC_WinH = 280;
    var IEC_WinX = (screen.availWidth - IEC_WinW) / 2;
    var IEC_WinY = (screen.availHeight - IEC_WinH) / 2;
    var features = 'left='+IEC_WinX+',top='+IEC_WinY+',width='+IEC_WinW+'px,height='+IEC_WinH+'px,resizable=no,scrollbars=no,status=no,menubar=no';
    var ReferenceURL = location.href;    
    var query = "https://www.cp.sheridan.com/AddToCart.aspx?publisher_code=UNP&provider_code=MUSE&item_code=" +
                    item_code + "&item_title=" + item_title + "&item_category=" + item_category + "&item_doi=" + item_doi + "&author_names=" + author_names +
                    "&item_issue_num=" + item_issue_num + "&item_volume_num=" + item_volume_num + "&item_info_url=" + item_info_url +
                    "&item_pdf_url=" + item_pdf_url + "&starting_page_num=" + starting_page_num + "&ending_page_num=" + ending_page_num +
                    "&total_page_num=" + total_page_num + "&ReferenceURL=" + ReferenceURL+ "&journal_title=" + journal_title;
                    
    if(IEC_Win==null || IEC_Win.closed)
    {
        IEC_Win = window.open(query,'',features);
        
        if(IEC_Win == null)
        {
            alert(MsgPopupBlocker);
            return false;
        }
    }
    else
    {
        IEC_Win.location.href = query;
    }
    IEC_Win.focus();
    return false;
}
 function UrlEncode(text) 


                {		
                	var Character = new Array('%', ' ', '~', '!', '@', '#', '$', '^', '&', '*', '(', ')', '{', '}', '[', ']', '=', ':', '/', ',', ';', '?', '+', '\'', '"', '\\'); 
                	var URLEncoded = new Array('%25', '%20', '%7E', '%21', '%40', '%23', '%24', '%5E', '%26', '%2A', '%28', '%29', '%7B', '%7D', '%5B', '%5D', '%3D', '%3A', '%2F', '%2C', '%3B', '%3F', '%2B', '%27', '%22', '%5C');
                	//text=ReplaceAll(text, "/\", "%2F"); 
                	text=ReplaceAll(text, Character[0], URLEncoded[0]);
                	text=ReplaceAll(text, Character[1], URLEncoded[1]);
                	text=ReplaceAll(text, Character[2], URLEncoded[2]);
                	text=ReplaceAll(text, Character[3], URLEncoded[4]);
                	text=ReplaceAll(text, Character[4], URLEncoded[5]);
                	text=ReplaceAll(text, Character[5], URLEncoded[6]);
                	text=ReplaceAll(text, Character[6], URLEncoded[7]);
                	text=ReplaceAll(text, Character[7], URLEncoded[8]);
                	text=ReplaceAll(text, Character[8], URLEncoded[9]);
                	text=ReplaceAll(text, Character[9], URLEncoded[10]);
                	text=ReplaceAll(text, Character[10], URLEncoded[11]);
                	text=ReplaceAll(text, Character[12], URLEncoded[12]);
                	text=ReplaceAll(text, Character[13], URLEncoded[13]);
                	text=ReplaceAll(text, Character[14], URLEncoded[14]);
                	text=ReplaceAll(text, Character[15], URLEncoded[15]);
                	text=ReplaceAll(text, Character[16], URLEncoded[16]);
                	text=ReplaceAll(text, Character[17], URLEncoded[17]);
                	text=ReplaceAll(text, Character[18], URLEncoded[18]);
                	text=ReplaceAll(text, Character[19], URLEncoded[19]);
                	text=ReplaceAll(text, Character[20], URLEncoded[20]);
                	text=ReplaceAll(text, Character[21], URLEncoded[21]);
                	text=ReplaceAll(text, Character[22], URLEncoded[22]);
                	text=ReplaceAll(text, Character[23], URLEncoded[23]);
                	text=ReplaceAll(text, Character[24], URLEncoded[24]);
                	text=ReplaceAll(text, Character[25], URLEncoded[25]);
                	
                	return text;
            }
 //Replace all given string from a string
            //     
            function ReplaceAll(varb, replaceThis, replaceBy)


                {	
                	newvarbarray=varb.split(replaceThis);
                	newvarb=newvarbarray.join(replaceBy);	
                	return newvarb;
            }
function Checkout()
{
    if(IEC_Win != null && !IEC_Win.closed) 
        IEC_Win.close();
    
    window.location.href = 'https://www.cp.sheridan.com/Default.aspx?publisher_code=UNP&provider_code=MUSE';
}