Javascript Remove a parameter from the query sring if found in current url

This Javascript function removes the supplied parameter from the query string if it is present in the current url. This is done by converting the query string into an array of parameters and values, then rebuilding the final string to exclude the parameter supplied to the function. The browser is then redirected to the current page with the new query string.

       
function removeParameter(parameter)
{
   //Get Query String from url
   fullQString = window.location.search.substring(1);
   
   paramCount = 0;
   queryStringComplete = "?";

   if(fullQString.length > 0)
   {
       //Split Query String into separate parameters
       paramArray = fullQString.split("&");
       
       //Loop through params, check if parameter exists.  
       for (i=0;i<paramArray.length;i++)
       {
         currentParameter = paramArray[i].split("=");
         if(currentParameter[0] == parameter) //Parameter already exists in current url
         {
            //don't include existing (will be appended to end of url)
         }
         else //Existing unrelated parameter
         {
            if(paramCount > 0)
               queryStringComplete = queryStringComplete + "&";
           
            queryStringComplete = queryStringComplete + paramArray[i];
            paramCount++;
         }
       }
   }
   
   window.location = self.location.protocol + '//' + self.location.host + self.location.pathname + queryStringComplete;
}

       
 

Javascript Get the value of the specified Query String Parameter

This Javascript function checks the address of the current page for the supplied query string parameter. If found, the value of the parameter is used, if the parameter is not found, false is returned. See also: checkParemeterExists(), which returns true or false if the specified parameter is found or not.

       
function getParameter(parameter)
{
   fullQString = window.location.search.substring(1);
   paramArray = fullQString.split("&");
   
   found = false;
   for (i=0;i<paramArray.length;i++)
   {
     currentParameter = paramArray[i].split("=");
     if(currentParameter[0] == parameter)
        return currentParameter[1];
   }
   return false; //Not found
}
       
 

Javascript Check if Query String Parameter Exists in current URL

This Javascript function checks if the parameter supplied exists in the query string. If the parameter supplied is found in the query string of the current URL, the function will return true. If the parameter is not found, false is returned. See also: getParameter() - This function returns the value of the parameter if found, and false if it is not found which can be used instead of the checkParameterExists() function below

       
function checkParemeterExists(parameter)
{
   //Get Query String from url
   fullQString = window.location.search.substring(1);
   
   paramCount = 0;
   queryStringComplete = "?";

   if(fullQString.length > 0)
   {
       //Split Query String into separate parameters
       paramArray = fullQString.split("&");
       
       //Loop through params, check if parameter exists.  
       for (i=0;i<paramArray.length;i++)
       {
         currentParameter = paramArray[i].split("=");
         if(currentParameter[0] == parameter) //Parameter already exists in current url
         {
            return true;
         }
       }
   }
   
   return false;
}