1 files changed, 13 insertions, 15 deletions

diff --git a/js/RrdGraph.js b/js/RrdGraph.js
index a3b0124..038668e 100644
--- a/js/RrdGraph.js
+++ b/js/RrdGraph.js
@@ -266,10 +266,10 @@ RrdGraphDesc.prototype.fshift = function (graph, vname, offset)
 
         this.shidx = graph.find_var(offset);
         if (this.shidx >= 0) {
-                if  (graph.gdes[gdp.shidx].gf === RrdGraphDesc.GF_DEF || graph.gdes[gdp.shidx].gf === RrdGraphDesc.GF_CDEF)
-                        throw new RrdGraphDescError("Offset cannot be a (C)DEF: '"+graph.gdes[gdp.shidx].gf+"'");
-                if  (graph.gdes[gdp.shidx].gf !== RrdGraphDesc.GF_VDEF)
-                        throw new RrdGraphDescError("Encountered unknown type variable '"+graph.gdes[gdp.shidx].vname+"'");
+                if  (graph.gdes[this.shidx].gf === RrdGraphDesc.GF_DEF || graph.gdes[this.shidx].gf === RrdGraphDesc.GF_CDEF)
+                        throw new RrdGraphDescError("Offset cannot be a (C)DEF: '"+graph.gdes[this.shidx].gf+"'");
+                if  (graph.gdes[this.shidx].gf !== RrdGraphDesc.GF_VDEF)
+                        throw new RrdGraphDescError("Encountered unknown type variable '"+graph.gdes[this.shidx].vname+"'");
         } else {
                 this.shval = parseInt(offset, 10); // FIXME check
                 this.shidx = -1;
@@ -323,6 +323,9 @@ RrdGraphDesc.prototype.gprint = function (graph, vname, cf, format, strftimefmt)
         this.vname = vname;
         this.vidx = graph.find_var(vname);
         this.legend = '';
+        if (this.vidx == -1) {
+                throw new RrdGraphDescError("Cannot find var name: " + vname);
+        }
         if (!format) {
                 this.format = cf;
                 switch (graph.gdes[this.vidx].gf) {
@@ -437,7 +440,7 @@ var RrdVdef = function(vname, str) /* parse */
         else if (func === 'LSLINT') this.op = RrdVdef.VDEF_LSLINT;
         else if (func === 'LSLCORREL') this.op = RrdVdef.VDEF_LSLCORREL;
         else {
-                throw new RrdVdefError('Unknown function "'+func+'" in VDEF "'+vame+'"');
+                throw new RrdVdefError('Unknown function "'+func+'" in VDEF "'+vname+'"');
         }
 
         switch (this.op) {
@@ -511,15 +514,15 @@ RrdVdef.prototype.calc = function(src)
 {
         var data;
         var step, steps;
+        var array = [];
+        var field;
+        var cnt = 0;
 
         data = src.data;
         steps = (src.end - src.start) / src.step;
 
         switch (this.op) {
                 case RrdVdef.VDEF_PERCENT:
-                        var array = [];
-                        var field;
-
                         for (step = 0; step < steps; step++) {
                                 array[step] = data[step * src.ds_cnt];
                         }
@@ -529,18 +532,15 @@ RrdVdef.prototype.calc = function(src)
                         this.when = 0;   /* no time component */
                         break;
                 case RrdVdef.VDEF_PERCENTNAN:
-                        var array = [];
-                        var field;
-
                         field=0;
                         for (step = 0; step < steps; step++) {
                                 if (!isNaN(data[step * src.ds_cnt])) {
                                         array[field] = data[step * src.ds_cnt];
                                 }
                         }
-                        array.sort(vdef_percent_compar);
+                        array.sort(this.vdef_percent_compar);
                         field = Math.round(this.param * (field - 1) / 100.0);
-                        his.val = array[field];
+                        this.val = array[field];
                         this.when = 0;   /* no time component */
                         break;
                 case RrdVdef.VDEF_MAXIMUM:
@@ -566,7 +566,6 @@ RrdVdef.prototype.calc = function(src)
                 case RrdVdef.VDEF_TOTAL:
                 case RrdVdef.VDEF_STDEV:
                 case RrdVdef.VDEF_AVERAGE:
-                        var cnt = 0;
                         var sum = 0.0;
                         var average = 0.0;
 
@@ -645,7 +644,6 @@ RrdVdef.prototype.calc = function(src)
                 case RrdVdef.VDEF_LSLSLOPE:
                 case RrdVdef.VDEF_LSLINT:
                 case RrdVdef.VDEF_LSLCORREL:
-                        var cnt = 0;
                         var SUMx, SUMy, SUMxy, SUMxx, SUMyy, slope, y_intercept, correl;
 
                         SUMx = 0;