checkForm: function() {this.prepareForm();for ( var i = 0, elements = ( this.currentElements = this.elements() ); elements[ i ]; i++ ) {this.check( elements[ i ] );}return this.valid();},

elements: function() {var validator = this,rulesCache = {};// Select all valid inputs inside the form (no submit or reset buttons)return $( this.currentForm ).find( "input, select, textarea, [contenteditable]" ).not( ":submit, :reset, :image, :disabled" ).not( this.settings.ignore )//在这个地方会对隐藏元素进行过滤，返回的elements会少了很多隐藏的元素。.filter( function() {var name = this.name || $( this ).attr( "name" ); // For contenteditableif ( !name && validator.settings.debug && window.console ) {console.error( "%o has no name assigned", this );}// Set form expando on contenteditableif ( this.hasAttribute( "contenteditable" ) ) {this.form = $( this ).closest( "form" )[ 0 ];}// Select only the first element for each name, and only those with rules specifiedif ( name in rulesCache || !validator.objectLength( $( this ).rules() ) ) {return false;}rulesCache[ name ] = true;return true;} );},

showErrors: function( errors ) {if ( errors ) {var validator = this;// Add items to error list and map$.extend( this.errorMap, errors );this.errorList = $.map( this.errorMap, function( message, name ) {return {message: message,element: validator.findByName( name )[ 0 ]};} );// Remove items from success listthis.successList = $.grep( this.successList, function( element ) {return !( element.name in errors );} );}if ( this.settings.showErrors ) {this.settings.showErrors.call( this, this.errorMap, this.errorList );} else {var anyElementsNeedUpdate = false; //参数表示是否需要去更新DOM树中的元素for (var i = 0; i < this.errorList.length; i++) {if (!$(this.errorList[i].element).hasClass(this.settings.errorClass)) {anyElementsNeedUpdate = true;//1.当之前验证有错误的元素已经修改正确即没有了这个errorClass，需要去更新elementbreak;}}if (!anyElementsNeedUpdate) {for (var i = 0; i < this.successList.length; i++) {if ($(this.successList[i]).hasClass(this.settings.errorClass)) {anyElementsNeedUpdate = true;//2.当之前验证成功的元素现在含有这个errorClass，需要去更新elementbreak;}}}if (anyElementsNeedUpdate) {//如果有上面两种情况之一都需要去更新DOM元素，否则不应该去调用defaultShowErrors();this.defaultShowErrors();}}},