经典图片表单提交 不用构造object

id为imgForm的表单

 

$('#tableRecCode').attr("value", pirCode);
	 	$('#imgForm').attr("action", servicefulPath + "/extraUnlading/uploadPicture");
	 	var form = new FormData(document.getElementById("imgForm"));
	 	var file=document.getElementById("fileUpload").files[0];
	 	if(!file) {
	 		 $.messager.show({
	    			title : '提示',
	    			msg : "请选择图片！"
	    		});
	 		return;
	 	}
	 	 $.ajax({
	 	     url:servicefulPath + "/traAccident/imgUpload",
	 	     type:"post",
	 	     data:form,
	 	     processData:false,
	 	     contentType:false,
	 	     success:function(response){
	 	        【成功】
	 	     },
	 	     error:function(e){
	 	    	【失败】
	 	     }
	 	 });