var myPopupWindow = '';  


function openPopupWindow(url, name, width, height)  
 {  
     //Remove special characters from name  
     name = name.replace(/\/|\-|\./gi, "");  
   
     //Remove whitespaces from name  
     var whitespace = new RegExp("\\s","g");  
     name = name.replace(whitespace,"");  
   
     //If it is already open  
     if (!myPopupWindow.closed && myPopupWindow.location)  
     {  
         myPopupWindow.location.href = encodeUrl(url);  
     }  
     else  
     {  
         myPopupWindow= window.open(encodeUrl(url),name, "location=No, scrollbars=No, resizable=No, toolbar=No, menubar=No, width=" + width + ", height=" + height );  
         if (!myPopupWindow.opener) myPopupWindow.opener = self;  
     }  
   
      //If my main window has focus - set it to the popup  
     if (window.focus) {myPopupWindow.focus()}  
}  



function encodeUrl(url)  
{  
if (url.indexOf("?")>0)  
{  
encodedParams = "?";  
parts = url.split("?");  
params = parts[1].split("&");  
for(i = 0; i < params.length; i++)  
{  
if (i > 0)  
{  
encodedParams += "&";  
}  
if (params[i].indexOf("=")>0) //Avoid null values  
{  
p = params[i].split("=");  
encodedParams += (p[0] + "=" + escape(encodeURI(p[1])));  
}  
else  
{  
encodedParams += params[i];  
}  
}  
url = parts[0] + encodedParams;  
}  
return url;  
}