src1='main/image.jpg' //主路径
src2='another/image.jpg' //备用路径

$('#imgMap' ).attr("src",src1).load(function(){console.log("图片加载成功")
        }).error(function(){
          console.log("图片加载失败，切换路径")
          $('#imgMap').attr('src',src2)    
        });

$('#img').attr("src",src1).bind( "load", function() {
 console.log("图片加载成功")
}).bind("error",function(){
  console.log("图片加载失败，切换路径")
      $('#img').attr('src',src2)  
});

$('#img').attr("src",src1).on( "load", function() {
 console.log("图片加载成功")
}).on("error",function(){
  console.log("图片加载失败，切换路径")
      $('#img').attr('src',src2)  
});

var Image = document.getElementById('img');
Image.src=src1;
Image.addEventListener('load', function(event) {
       console.log("图片加载成功")
});
Image.addEventListener('error', function(event) {
      console.log("图片加载失败，切换路径")
       Image.src=src2;
});