轨迹阅卷模式下，支持键盘快捷键切换小题，使用<>这两个按键

stmms-web/src/main/webapp/static/mark-track/js/modules/mark-board.js

@@ -61,7 +61,8 @@ function MarkBoard(option) {
     });
 	this.markControl.on('key.press', this, function(e, context, event) {
         var code = event.keyCode;
-        //console.log('key press:' + code);
+//        console.log('key press:' + code);
+        var self = this;
         if (this.currentStep != undefined && this.task != undefined) {
             if (code >= 48 && code <= 57) {
                 this.onNumberInput(code - 48);
@@ -71,12 +72,26 @@ function MarkBoard(option) {
                 this.onNumberInput(code - 96);
                 event.preventDefault();
                 return false;
-            } else if (code == 46 || code == 110 || code == 190) {
-                //小数点
-                this.onNumberInput('.');
-                event.preventDefault();
-                return false;
-            }
+//            } else if (code == 46 || code == 110 || code == 190) {
+//                //小数点
+//                this.onNumberInput('.');
+//                event.preventDefault();
+//                return false;
+            } else if (code == 44) {
+                //<按键，切换到上一个步骤
+                if (this.currentStep.number > 1) {
+                	self.onStepSelect(this.currentStep.number - 1);
+                    event.preventDefault();
+                    return false;
+                }
+            } else if (code == 46) {
+                //>按键，切换到下一个步骤
+                if (this.currentStep.number < this.stepCount && this.currentStep.markScore != undefined) {
+                	self.onStepSelect(this.currentStep.number + 1);
+                    event.preventDefault();
+                    return false;
+                }
+            } 
         }
     });
 }
@@ -201,6 +216,22 @@ MarkBoard.prototype.render = function(task) {
 	}
 }
 
+//切换步骤时，重置当前步骤的状态
+//若当前分数未提交，则还原之前已给的分数；若之前还未给分，则清空分数显示
+MarkBoard.prototype.resetCurrentStep = function() {
+  var step = this.currentStep;
+  if (step != undefined) {
+      if (step.markScore != undefined) {
+          step.markFinish = true;
+          step.score = new String(step.markScore);
+      } else {
+          step.markFinish = false;
+          step.score = '';
+      }
+      this.markControl.trigger('mark.score.change');
+  }
+}
+
 MarkBoard.prototype.onStepSelect = function(stepNumber) {
 	if(stepNumber <= this.stepCount && stepNumber > 0) {
 		var self = this;