Fixed issue #05777: performance issue: lots of irrelevant javacript i…

…s called with each onchange event

Dev Refactored Javascript code generated by EM to have separate relevance and validation functions for each qid
Dev Each relevance function knows exactly which variables and/or other qids could affect its operation, so ensures cascading while minimizing calling functions with nothing significant has changed
Dev also fixed issue with multi_set() - was not calling checkconditions onchange
Dev also fixed issue with slider - was not calling checkconditions onchange with the parameters that EM needs
Dev also fixed issue with Tab behavior - if tabbed off of a text input box, then clicked a checkbox, nothing would happen until next  change - fixed.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey_dev@12404 b72ed6b6-b9f8-46b5-92b4-906544132732

classes/eval/ExpressionManager.php

@@ -1311,7 +1311,7 @@ public function GetJavascriptTestforExpression($expected,$num)
     public function GetJavaScriptFunctionForReplacement($questionNum, $name,$eqn)
     {
         $jsParts = array();
-        $jsParts[] = "\n  // Tailor Question " . $questionNum . " - " . $name . ": { " . $eqn . " }\n";
+//        $jsParts[] = "\n  // Tailor Question " . $questionNum . " - " . $name . ": { " . $eqn . " }\n";
         $jsParts[] = "  try{\n";
         $jsParts[] = "  document.getElementById('" . $name . "').innerHTML=htmlspecialchars(\n    ";
         $jsParts[] = $this->GetJavaScriptEquivalentOfExpression();