function changesrc(e){
	e.src=e.src+'?';
}
function subreply(){
	var scode = $("#safecode3").val();
	$.ajax({
		 type: "GET",
		 url:  "check_safecode.php",
		 data: str = 'safecode='+scode,
		 dataType:"json",
		 success: function(json){
			 			if(json.code == 1){
							$("#form").submit();}
						if(json.code == 0){
							document.getElementById("safecode3").value = '';
							changesrc(document.getElementById("safeimg"));
							alert('验证码错误！');
							
						}
		 }
		 }); 
}