<div id="container" style="width: 100%; height: 400px; margin: 0 auto"></div>

<script src="http://code.highcharts.com/highcharts.js"></script>

<script language="JavaScript">
$(document).ready(function() {

	var yuanjia = "${yuanjia}";
	var xianjia = "${xianjia}";
	var num_iid = "${tbk_item_info.num_iid}";
	//alert(yuanjia + " - "+ xianjia);
	//console.log(yuanjia);
	//console.log(xianjia);
	
	// 取两个数字将的随机数
	function rnd(min, max){
		var oneN = Math.round((Math.random() * (max - min) + min) * 9.5) / 10;
		if(oneN < 0){
		//console.log("fushu");
			oneN = rnd(min, max);
		}
	  return oneN;
	}
	
   // 将原价加10，分7档
   var ceil_yj = Math.ceil( (Math.ceil(yuanjia)+10) / 5 );
   
   var yAs = [];
   for(var i=0; i<5; i++){
   		yAs.push(ceil_yj * i);
   }
   console.log(yAs);
   
   // 将现价
   var xAs = [];
   if($.cookie(num_iid+"_xAs") == undefined || $.cookie(num_iid+"_xAs") == 'NaN' || $.cookie(num_iid+"_xAs") == 'null'){
	   for(var i=0; i<3; i++){
	   		xAs.push(rnd((Math.ceil(yuanjia)-10), xianjia));
	   }
	   xAs.push(parseFloat(xianjia));
	   $.cookie(num_iid+"_xAs",xAs);
   }else{
   		xAs = $.cookie(num_iid+"_xAs").split(",").map(Number);
   }
   console.log(xAs);
	
   var title = {
       text: '最近三个月的价格'   
   };
   var subtitle = {
        text: 'Source: runoob.com'
   };
   var xAxis = {
       categories: ['一月', '二月', '三月', '四月', '五月', '六月',
              '七月', '八月', '九月', '十月', '十一月', '十二月']
   };
   var yAxis = {
      title: {
         text: 'Temperature (\xB0C)'
      },
      
      //tickPositions: [10, 20, 30, 40, 50, 60, 70, 80, 90, 100],
      tickPositions: yAs,
      
      plotLines: [{
         value: 0,
         width: 1,
         color: '#808080'
      }]
   };   

   var tooltip = {
   	  valuePrefix: '￥'
      //valueSuffix: '元',
   };

   var legend = {
      layout: 'vertical',
      align: 'right',
      verticalAlign: 'middle',
      borderWidth: 0
   };

   var series =  [
      {
         name: '价格',
         data: xAs,
         marker: {
            symbol: 'diamond'
         },
         
      }
      /* , 
      {
         name: 'New York',
         data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8,
            24.1, 20.1, 14.1, 8.6, 2.5]
      }, 
      {
         name: 'Berlin',
         data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6,
            17.9, 14.3, 9.0, 3.9, 1.0]
      }, 
      {
         name: 'London',
         data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 
            16.6, 14.2, 10.3, 6.6, 4.8]
      } */
   ];
   
   var plotOptions= {
	    line: {
	        dataLabels: {
	            enabled: true,
	            
	        }
	    }
	};

	var credits={
     enabled:false
	};

   var json = {};

   json.title = title;
   json.subtitle = subtitle;
   json.xAxis = xAxis;
   json.yAxis = yAxis;
   json.tooltip = tooltip;
   json.legend = legend;
   json.series = series;
   json.plotOptions = plotOptions;
   json.credits = credits;

   $('#container').highcharts(json);
});
</script>


Highcharts JS去除Highcharts.com链接的方法

在js文件中找到Credits，然后把enable的属性从!0改为0。

也可以更改为自己需要的：

enabled:设置是否显示链接
text：设置链接显示的名称
href：设置链接的url