Possible Duplicate:
JavaScript query string
I'd like to access query variables attached to my script url. So for example:
<script type="text/javascript" src="http://mysite.com/app.js?var1=value1&var2=value2"></script>
In app.js, how do I access the var1 and var2 values?
This page describes a method for getting these values:
<script type="text/javascript"
src="scriptaculous.js?load=effects,builder"></script>
And the javascript:
function getJSvars(script_name, var_name, if_empty) {
var script_elements = document.getElementsByTagName(‘script’);
if(if_empty == null) {
var if_empty = ”;
}
for (a = 0; a < script_elements.length; a++) {
var source_string = script_elements[a].src;
if(source_string.indexOf(script_name)>=0) {
var_name = var_name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regex_string = new RegExp("[\\?&]"+var_name+"=([^&#]*)");
var parsed_vars = regex_string.exec(source_string);
if(parsed_vars == null) { return if_empty; }
else { return parsed_vars[1]; }
}
}
}
Parse the src attribute, roughly as follows:
var src=document.getELementById("script-id").getAttribute("src");
var query=src.substring(src.indexOf("?"));
var query_vals=query.split("&");
var queries={};
for (var i=0;i<query_vals.length;i++) {
var name_val=query_vals.split("=");
queries[name_val[0]]=name_val[1];
}
console.log(queries.var1, queries.var2);
However, there are libraries such as url.js which are a better bet for doing this, and much more robust in the face of URL encoding etc.