Make sure that hide or show don't fail when operating on non-Element nodes. Fixes #6135.

src/effects.js

@@ -28,6 +28,8 @@ jQuery.fn.extend({
 		} else {
 			for ( var i = 0, j = this.length; i < j; i++ ) {
 				elem = this[i];
+
+				if ( elem.style ) {
 					display = elem.style.display;
 
 					// Reset the inline display of this element to learn if it is
@@ -43,17 +45,21 @@ jQuery.fn.extend({
 						jQuery._data(elem, "olddisplay", defaultDisplay(elem.nodeName));
 					}
 				}
+			}
 
 			// Set the display of most of the elements in a second loop
 			// to avoid the constant reflow
 			for ( i = 0; i < j; i++ ) {
 				elem = this[i];
+
+				if ( elem.style ) {
 					display = elem.style.display;
 
 					if ( display === "" || display === "none" ) {
 						elem.style.display = jQuery._data(elem, "olddisplay") || "";
 					}
 				}
+			}
 
 			return this;
 		}
@@ -75,8 +81,10 @@ jQuery.fn.extend({
 			// Set the display of the elements in a second loop
 			// to avoid the constant reflow
 			for ( i = 0; i < j; i++ ) {
+				if ( this[i].style ) {
 					this[i].style.display = "none";
 				}
+			}
 
 			return this;
 		}

test/unit/effects.js

@@ -88,6 +88,10 @@ test("show()", function() {
 		var elem = jQuery(selector, "#show-tests").show();
 		equals( elem.css("display"), expected, "Show using correct display type for " + selector );
 	});
+
+	// Make sure that showing or hiding a text node doesn't cause an error
+	jQuery("<div>test</div> text <span>test</span>").show().remove();
+	jQuery("<div>test</div> text <span>test</span>").hide().remove();
 });
 
 test("show(Number) - other displays", function() {