JS 判断浏览器是否安装Flash 兼容IE、firefox

 /**
 * @Author:     HTL
 * @Email:       Huangyuan413026@163.com
 * @DateTime:    2016-06-02 11:37:05
 * @Description: 是否安装了Flash插件
 * @Source:  http://blog.csdn.net/tong_xinglong/article/details/7345419
 */
function has_flash(){
	var isIE = !-[1,];
	if(isIE){
	    try{
	        return !!new ActiveXObject(‘ShockwaveFlash.ShockwaveFlash‘);
         }
	    catch(e){	       
	    }
	}
	else {
	    try{	      
	        return !!navigator.plugins[‘Shockwave Flash‘];
	    }
	    catch(e){	    	
	    }
	}
	return false;
}