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;
}

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=yes, resizable=yes, 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()}
}