function TestTryCatch(){

    try {

    } catch (error) {

        //error 类型如下 Error EvalError RangeError ReferenceError

        //SyntaxError TypeError  URIError

        if(error instanceof TypeError){

        }else if( error instanceof ReferenceError){

        }else{

        }

    }

    finally{

    }

}

//17.2.2 抛出错误

function process(values){

    if(!(values instanceof Array)){

        throw new Error('process():Argument must be an array');

    }

    values.sort();

    for(var i=0,len=values.length;i<len;i++){

        if(values[i] >100){

            return values[i];

        }

    }

    return -1;

}

//自定义错误

function CustomError(message)

{

   this.name ='CustomError';

   this.message = message;

}

CustomError.prototype =new Error();

//17.2.3 错误（error)事件

window.onerror =function(message,url,line){

    alert(message);

    return false;

}

//throw new CustomError('CustomError');

var image = new Image();

image.addEventListener('load',function(event){

    alert('Image loaded');

},false);

image.addEventListener('error',function(event){

    alert('Image not laoded');

},false);

image.src ='smilex.gif';

//17.2.4 处理错误的策略

//略

//17.2.5 常见的错误类型

function concat(str1,str2,str3){

    var result =str1+str2;

    if( typeof str3 =='string'){

        result +=str3;

    }

    return result;

}

function getQueryString(url){

    if( typeof url =='string'){

        var pos = url.indexOf('?');

        if(pos>-1){

            return url.substring(pos+1);

        }

    }

}

function reverseSort(values){

    if( typeof values.sort =='function'){

        values.sort();

        values.reverse();

    }

}

//17.2.6 区分致命错误和非致命错误

//17.2.7 把错误记录到服务器