Only fadeIn/Out or slideUp/Down elements that are already hidden/visible (for #1051).
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@ -143,7 +143,7 @@ jQuery.fn.extend({
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* @see slideToggle(String|Number,Function)
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*/
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slideDown: function(speed,callback){
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return this.animate({height: "show"}, speed, callback);
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return this.filter(":hidden").animate({height: "show"}, speed, callback).end();
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},
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/**
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@ -168,7 +168,7 @@ jQuery.fn.extend({
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* @see slideToggle(String|Number,Function)
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*/
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slideUp: function(speed,callback){
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return this.animate({height: "hide"}, speed, callback);
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return this.filter(":visible").animate({height: "hide"}, speed, callback).end();
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},
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/**
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@ -222,7 +222,7 @@ jQuery.fn.extend({
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* @see fadeTo(String|Number,Number,Function)
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*/
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fadeIn: function(speed, callback){
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return this.animate({opacity: "show"}, speed, callback);
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return this.filter(":hidden").animate({opacity: "show"}, speed, callback).end();
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},
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/**
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@ -248,7 +248,7 @@ jQuery.fn.extend({
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* @see fadeTo(String|Number,Number,Function)
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*/
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fadeOut: function(speed, callback){
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return this.animate({opacity: "hide"}, speed, callback);
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return this.filter(":visible").animate({opacity: "hide"}, speed, callback).end();
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},
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/**
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