example/public/ueditor/third-party/highcharts/highcharts.src.js
function (className) {
		var element = this.element,
			currentClassName = attr(element, 'class') || '';

		if (currentClassName.indexOf(className) === -1) {
			attr(element, 'class', currentClassName + ' ' + className);
		}
		return this;
	}
function (className) {
		var element = this.element,
			currentClassName = attr(element, 'class') || '';

		if (currentClassName.indexOf(className) === -1) {
			attr(element, 'class', currentClassName + ' ' + className);
		}
		return this;
	}
function ( className ) { var element = this . element , currentClassName = attr ( element , 'class' ) || '' ; if ( currentClassName . indexOf ( className ) === - 1 ) { attr ( element , 'class' , currentClassName + ' ' + className ) ; } return this ; }
Add a class name to an element
Add a class name to an element