use simple hash function to avoid re-sending all targets as alias

gistfile1.txt

diff --git a/jquery.tswidget.js b/jquery.tswidget.js
index b30e77a..f300745 100755
--- a/jquery.tswidget.js
+++ b/jquery.tswidget.js
@@ -4,6 +4,9 @@ function strip_ending_slash(str) {
     }
     return str;
 }
+function hash_target(target) {
+  return target.split("").reduce(function(a,b){a=((a<<5)-a)+b.charCodeAt(0);return a&a;},0);
+}
 
 function build_graphite_options(options, raw) {
     raw = raw || false;
@@ -36,7 +39,7 @@ function build_graphite_options(options, raw) {
         }
         if (key === "targets") {
             $.each(value, function (index, value) {
-                    if (raw) {
+                if (raw) {
                         // it's normally pointless to use alias() in raw mode, because we apply an alias (name) ourself
                         // in the client rendering step.  we just need graphite to return the target.
                         // but graphite sometimes alters the name of the target in the returned data
@@ -44,10 +47,10 @@ function build_graphite_options(options, raw) {
                         // so we need a good string identifier and set it using alias() (which graphite will honor)
                         // so that we recognize the returned output. simplest is just to include the target spec again
                         // though this duplicates a lot of info in the url.
-                        clean_options.push("target=alias(" + encodeURIComponent(value.target) + ",'" + encodeURIComponent(value.target) +"')");
-                    } else {
-                        clean_options.push("target=alias(color(" +encodeURIComponent(value.target + ",'" + value.color) +"'),'" + encodeURIComponent(value.name) +"')");
-                    }
+                        clean_options.push("target=alias(" + encodeURIComponent(value.target) + ",'" + hash_target(value.target) +"')");
+                } else {
+                    clean_options.push("target=alias(color(" +encodeURIComponent(value.target + ",'" + value.color) +"'),'" + encodeURIComponent(value.name) +"')");
+                }
             });
         } else if (value !== null) {
             clean_options.push(key + "=" + encodeURIComponent(value));
@@ -83,7 +86,7 @@ function find_definition (target_graphite, options) {
     var matching_i = undefined;
     for (var cfg_i = 0; cfg_i < options.targets.length && matching_i == undefined; cfg_i++) {
         // string match (no globbing)
-        if(options.targets[cfg_i].target == target_graphite.target) {
+        if(hash_target(options.targets[cfg_i].target) == target_graphite.target) {
             matching_i = cfg_i;
         }
         // glob match?