$(function(){
		     $('input[name=sub]').click(function(){
		            var name=$('#username').attr("value");
					if(name==''){alert("please enter your username");$('#username').focus();return false;}
					var mail=$('#mail').attr("value");
					if(mail==''){alert("please enter your mail");$('#mail').focus();return false;}
					if(!checkEmail(mail)){
					{alert("Please enter a well-formatted address");$('#mail').focus();return false;}	
						}
					//var phone=$('#phone').attr("value");
					//if(phone==''){alert("please enter your phone");$('#phone').focus();return false;}
					var contents=$('#contents').attr("value");
					if(contents==''){alert("please enter your contents");$('#contents').focus();return false;}
					
				 submsg();
					
				})

		
	   function submsg(){
               var all_str = $('form').serialize();
			   $.ajax({
					   url:'msg.php',
					   type:'post',
					   datatype:'json',
					   data:all_str,
					   //data: "page =" + pageIndex,//要发送的数据，与上面可以并存吗？
			           error:function(){
                       alert('System busy, please try later');
                       },
			  complete:function(){
				  alert("Thank you for your message!");
				    $('#contents').attr("value",'');
				   
			  },//AJAX请求完成时隐藏loading提示
	   
			  success:function(msg){//msg为返回的数据，在这里做数据绑定
			   //alert(msg);
			  },
			 
			})
	    }
		
function checkEmail(email){
var emailRegExp = new RegExp(            "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?");
if (!emailRegExp.test(email)||email.indexOf('.')==-1){
return false;
}else{
return true;
}
}
     
})