Add / Change parameter of URL and redirect to the new URL

Question

If the &view-all parameter does NOT exist in the URL I need to add it to the end of the URL along with a value. If it DOES exist then I need to be able to just change the value without creating a new URL because it might, or might not, have other parameters before it.

I found this function but I can't get it to work: https://stackoverflow.com/a/10997390/837705

Here is the code I have using the function above (which I can't get to work): http://jsfiddle.net/Draven/tTPYL/4/

I know how to append the parameter and value already:

<div onclick="javascript: window.location.assign(window.location.href+='&view-all=Yes');">Blah Blah</div>

More Info:

If the URL is http://www.domain.com/index.php?action=my_action then the default "&view-all" value would be "Yes" so the URL they would be directed to when they click the button is http://www.domain.com/index.php?action=my_action&view-all=Yes.

If the URL is http://www.domain.com/index.php?action=my_action&view-all=Yes then when they click the button it would change to http://www.domain.com/index.php?action=my_action&view-all=No​​​

EDIT: Please give me examples. I don't know alot of JS, and I just can't think of a way to do it in PHP.

Answer 1

function setGetParameter(paramName, paramValue) {     var url = window.location.href;     var hash = location.hash;     url = url.replace(hash, '');     if (url.indexOf(paramName + "=") >= 0)     {         var prefix = url.substring(0, url.indexOf(paramName + "="));          var suffix = url.substring(url.indexOf(paramName + "="));         suffix = suffix.substring(suffix.indexOf("=") + 1);         suffix = (suffix.indexOf("&") >= 0) ? suffix.substring(suffix.indexOf("&")) : "";         url = prefix + paramName + "=" + paramValue + suffix;     }     else     {     if (url.indexOf("?") < 0)         url += "?" + paramName + "=" + paramValue;     else         url += "&" + paramName + "=" + paramValue;     }     window.location.href = url + hash; } 

Call the function above in your onclick event.