diff --git a/extensions/freebase/module/scripts/dialogs/schema-alignment/ui-node.js b/extensions/freebase/module/scripts/dialogs/schema-alignment/ui-node.js
index a0fb6f989..354ca3e7c 100644
--- a/extensions/freebase/module/scripts/dialogs/schema-alignment/ui-node.js
+++ b/extensions/freebase/module/scripts/dialogs/schema-alignment/ui-node.js
@@ -471,7 +471,7 @@ SchemaAlignmentDialog.UINode.prototype._showNodeConfigDialog = function() {
     });
 
     if (column.name in columnMap) {
-      radio.attr("checked", "true");
+      radio.prop("checked", true);
     }
 
     $('<span></span>').text(column.name).appendTo(tr.insertCell(1));
diff --git a/extensions/gdata/module/scripts/index/importing-controller.js b/extensions/gdata/module/scripts/index/importing-controller.js
index 870bdddd4..dda358354 100644
--- a/extensions/gdata/module/scripts/index/importing-controller.js
+++ b/extensions/gdata/module/scripts/index/importing-controller.js
@@ -246,7 +246,7 @@ Refine.GDataImportingController.prototype._showParsingPanel = function() {
       .attr('sheetUrl', this.link)
       .appendTo(td0);
       if (i === 0) {
-        checkbox.attr('checked', 'true');
+        checkbox.prop("checked", true);
       }
       
       $('<label>')
@@ -261,28 +261,28 @@ Refine.GDataImportingController.prototype._showParsingPanel = function() {
     });
 
     if (this._options.ignoreLines > 0) {
-      this._parsingPanelElmts.ignoreCheckbox.attr("checked", "checked");
+      this._parsingPanelElmts.ignoreCheckbox.prop("checked", true);
       this._parsingPanelElmts.ignoreInput[0].value = this._options.ignoreLines.toString();
     }
     if (this._options.headerLines > 0) {
-      this._parsingPanelElmts.headerLinesCheckbox.attr("checked", "checked");
+      this._parsingPanelElmts.headerLinesCheckbox.prop("checked", true);
       this._parsingPanelElmts.headerLinesInput[0].value = this._options.headerLines.toString();
     }
   }
   
   if (this._options.limit > 0) {
-    this._parsingPanelElmts.limitCheckbox.attr("checked", "checked");
+    this._parsingPanelElmts.limitCheckbox.prop("checked", true);
     this._parsingPanelElmts.limitInput[0].value = this._options.limit.toString();
   }
   if (this._options.skipDataLines > 0) {
-    this._parsingPanelElmts.skipCheckbox.attr("checked", "checked");
+    this._parsingPanelElmts.skipCheckbox.prop("checked", true);
     this._parsingPanelElmts.skipInput.value[0].value = this._options.skipDataLines.toString();
   }
   if (this._options.storeBlankRows) {
-    this._parsingPanelElmts.storeBlankRowsCheckbox.attr("checked", "checked");
+    this._parsingPanelElmts.storeBlankRowsCheckbox.prop("checked", true);
   }
   if (this._options.storeBlankCellsAsNulls) {
-    this._parsingPanelElmts.storeBlankCellsAsNullsCheckbox.attr("checked", "checked");
+    this._parsingPanelElmts.storeBlankCellsAsNullsCheckbox.prop("checked", true);
   }
 
   var onChange = function() {
diff --git a/extensions/pc-axis/module/scripts/pc-axis-parser-ui.js b/extensions/pc-axis/module/scripts/pc-axis-parser-ui.js
index 47226aa48..f95de983c 100644
--- a/extensions/pc-axis/module/scripts/pc-axis-parser-ui.js
+++ b/extensions/pc-axis/module/scripts/pc-axis-parser-ui.js
@@ -110,15 +110,15 @@ Refine.PCAxisParserUI.prototype._initialize = function() {
     });
 
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.skipDataLines > 0) {
-    this._optionContainerElmts.skipCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.skipCheckbox.prop("checked", true);
     this._optionContainerElmts.skipInput.value[0].value = this._config.skipDataLines.toString();
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
 
   var onChange = function() {
diff --git a/main/webapp/modules/core/scripts/index/parser-interfaces/excel-parser-ui.js b/main/webapp/modules/core/scripts/index/parser-interfaces/excel-parser-ui.js
index 5d4bf9b59..e56fc3889 100644
--- a/main/webapp/modules/core/scripts/index/parser-interfaces/excel-parser-ui.js
+++ b/main/webapp/modules/core/scripts/index/parser-interfaces/excel-parser-ui.js
@@ -144,7 +144,7 @@ Refine.ExcelParserUI.prototype._initialize = function() {
     .attr('index', i)
     .appendTo(td0);
     if (this.selected) {
-      checkbox.attr('checked', 'true');
+      checkbox.prop('checked', true);
     }
 
     $('<label>')
@@ -159,29 +159,29 @@ Refine.ExcelParserUI.prototype._initialize = function() {
   });
 
   if (this._config.ignoreLines > 0) {
-    this._optionContainerElmts.ignoreCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.ignoreCheckbox.prop("checked", true);
     this._optionContainerElmts.ignoreInput[0].value = this._config.ignoreLines.toString();
   }
   if (this._config.headerLines > 0) {
-    this._optionContainerElmts.headerLinesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.headerLinesCheckbox.prop("checked", true);
     this._optionContainerElmts.headerLinesInput[0].value = this._config.headerLines.toString();
   }
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.skipDataLines > 0) {
-    this._optionContainerElmts.skipCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.skipCheckbox.prop("checked", true);
     this._optionContainerElmts.skipInput.value[0].value = this._config.skipDataLines.toString();
   }
   if (this._config.storeBlankRows) {
-    this._optionContainerElmts.storeBlankRowsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankRowsCheckbox.prop("checked", true);
   }
   if (this._config.storeBlankCellsAsNulls) {
-    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.prop("checked", true);
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
 
   var onChange = function() {
diff --git a/main/webapp/modules/core/scripts/index/parser-interfaces/json-parser-ui.js b/main/webapp/modules/core/scripts/index/parser-interfaces/json-parser-ui.js
index dcddc46df..ebc5a16f4 100644
--- a/main/webapp/modules/core/scripts/index/parser-interfaces/json-parser-ui.js
+++ b/main/webapp/modules/core/scripts/index/parser-interfaces/json-parser-ui.js
@@ -115,7 +115,7 @@ Refine.JsonParserUI.prototype._initialize = function() {
   $('#or-import-jsonParser').text($.i18n._('core-index-parser')["json-parser"]);
   
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.trimStrings) {
@@ -125,10 +125,10 @@ Refine.JsonParserUI.prototype._initialize = function() {
     this._optionContainerElmts.guessCellValueTypesCheckbox.attr("checked", "unchecked");
   }
   if (this._config.storeEmptyStrings) {
-    this._optionContainerElmts.storeEmptyStringsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeEmptyStringsCheckbox.prop("checked", true);
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
   this._optionContainerElmts.pickRecordElementsButton.click(function() {
     self._showPickRecordNodesUI();
diff --git a/main/webapp/modules/core/scripts/index/parser-interfaces/line-based-parser-ui.js b/main/webapp/modules/core/scripts/index/parser-interfaces/line-based-parser-ui.js
index e784a6b92..15dedb19c 100644
--- a/main/webapp/modules/core/scripts/index/parser-interfaces/line-based-parser-ui.js
+++ b/main/webapp/modules/core/scripts/index/parser-interfaces/line-based-parser-ui.js
@@ -138,25 +138,25 @@ Refine.LineBasedParserUI.prototype._initialize = function() {
     this._config.linesPerRow.toString();
 
   if (this._config.ignoreLines > 0) {
-    this._optionContainerElmts.ignoreCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.ignoreCheckbox.prop("checked", true);
     this._optionContainerElmts.ignoreInput[0].value = this._config.ignoreLines.toString();
   }
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.skipDataLines > 0) {
-    this._optionContainerElmts.skipCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.skipCheckbox.prop("checked", true);
     this._optionContainerElmts.skipInput.value[0].value = this._config.skipDataLines.toString();
   }
   if (this._config.storeBlankRows) {
-    this._optionContainerElmts.storeBlankRowsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankRowsCheckbox.prop("checked", true);
   }
   if (this._config.storeBlankCellsAsNulls) {
-    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.prop("checked", true);
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
 
   var onChange = function() {
diff --git a/main/webapp/modules/core/scripts/index/parser-interfaces/separator-based-parser-ui.js b/main/webapp/modules/core/scripts/index/parser-interfaces/separator-based-parser-ui.js
index 619625e03..a8c1a6ea8 100644
--- a/main/webapp/modules/core/scripts/index/parser-interfaces/separator-based-parser-ui.js
+++ b/main/webapp/modules/core/scripts/index/parser-interfaces/separator-based-parser-ui.js
@@ -159,41 +159,41 @@ Refine.SeparatorBasedParserUI.prototype._initialize = function() {
   var columnSeparatorValue = (this._config.separator == ",") ? 'comma' :
     ((this._config.separator == "\\t") ? 'tab' : 'custom');
   this._optionContainer.find(
-      "input[name='column-separator'][value='" + columnSeparatorValue + "']").attr("checked", "checked");
+      "input[name='column-separator'][value='" + columnSeparatorValue + "']").prop("checked", true);
   this._optionContainerElmts.columnSeparatorInput[0].value = this._config.separator;
 
   if (this._config.ignoreLines > 0) {
-    this._optionContainerElmts.ignoreCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.ignoreCheckbox.prop("checked", true);
     this._optionContainerElmts.ignoreInput[0].value = this._config.ignoreLines.toString();
   }
   if (this._config.headerLines > 0) {
-    this._optionContainerElmts.headerLinesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.headerLinesCheckbox.prop("checked", true);
     this._optionContainerElmts.headerLinesInput[0].value = this._config.headerLines.toString();
   }
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.skipDataLines > 0) {
-    this._optionContainerElmts.skipCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.skipCheckbox.prop("checked", true);
     this._optionContainerElmts.skipInput.value[0].value = this._config.skipDataLines.toString();
   }
   if (this._config.storeBlankRows) {
-    this._optionContainerElmts.storeBlankRowsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankRowsCheckbox.prop("checked", true);
   }
 
   if (this._config.guessCellValueTypes) {
-    this._optionContainerElmts.guessCellValueTypesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.guessCellValueTypesCheckbox.prop("checked", true);
   }
   if (this._config.processQuotes) {
-    this._optionContainerElmts.processQuoteMarksCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.processQuoteMarksCheckbox.prop("checked", true);
   }
 
   if (this._config.storeBlankCellsAsNulls) {
-    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeBlankCellsAsNullsCheckbox.prop("checked", true);
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
 
   var onChange = function() {
diff --git a/main/webapp/modules/core/scripts/index/parser-interfaces/xml-parser-ui.js b/main/webapp/modules/core/scripts/index/parser-interfaces/xml-parser-ui.js
index a9d633de5..ebe6696fb 100644
--- a/main/webapp/modules/core/scripts/index/parser-interfaces/xml-parser-ui.js
+++ b/main/webapp/modules/core/scripts/index/parser-interfaces/xml-parser-ui.js
@@ -112,20 +112,20 @@ Refine.XmlParserUI.prototype._initialize = function() {
   $('#or-import-store').html($.i18n._('core-index-parser')["store-source"]);
   
   if (this._config.limit > 0) {
-    this._optionContainerElmts.limitCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.limitCheckbox.prop("checked", true);
     this._optionContainerElmts.limitInput[0].value = this._config.limit.toString();
   }
   if (this._config.trimStrings) {
-    this._optionContainerElmts.trimStringsCheckbox.attr("checked", "unchecked");
+    this._optionContainerElmts.trimStringsCheckbox.prop("checked", false);
   }
   if (this._config.guessCellValueTypes) {
-    this._optionContainerElmts.guessCellValueTypesCheckbox.attr("checked", "unchecked");
+    this._optionContainerElmts.guessCellValueTypesCheckbox.prop("checked", false);
   }
   if (this._config.storeEmptyStrings) {
-    this._optionContainerElmts.storeEmptyStringsCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.storeEmptyStringsCheckbox.prop("checked", true);
   }
   if (this._config.includeFileSources) {
-    this._optionContainerElmts.includeFileSourcesCheckbox.attr("checked", "checked");
+    this._optionContainerElmts.includeFileSourcesCheckbox.prop("checked", true);
   }
   this._optionContainerElmts.pickRecordElementsButton.click(function() {
     self._showPickRecordElementsUI();