_error").html("验证码不能为空");
					$("#"+field+"_prompt_error").show();
					$("#"+field+"_field_error").addClass("form-field-error");
					return false;
				}
				var submitButton_disabled = $(".submitButton-box").find("a").attr("disabled");
				get_request(function(value){
	            	if(value == "false" && submitButton_disabled != "disabled"){
	            	
	            		$("#"+field+"_prompt_error").html("验证码错误");
						$("#"+field+"_prompt_error").show();
						$("#"+f