function check()
	{
		form = document.registerForm;
		var name = document.getElementsByName("username")[0];		
		if(name.value==""||name.value==null)
		{
		  alert("请输入用户名！");
		  name.focus();
	      return false;
		}
		
		if(!username_invalid(name.value))
		{
		  alert("用户名格式有误,请重新输入！");
		  name.focus();
	      return false;
		}
		
		var password = document.getElementsByName("password")[0];		
		if(password.value==""||password.value==null)
		{
		  alert("请输入密码！");
		  password.focus();
	      return false;
		}
		if(password.value.length<6)
		{
		  alert("请输入6位数以上密码！");
		  password.focus();
	      return false;
		}
		
		
		
		var chek_password = document.getElementsByName("chek_password")[0];		
		if(chek_password.value==""||chek_password==null)
		{
		  alert("请输入验证密码！");
		  chek_password.focus();
	      return false;
		}
		
				
		if(chek_password.value!=password.value)
		{
		  alert("两次密码输入不一致,请重新输入！");
		  chek_password.focus();
	      return false;
		}
		
		var boothnumber = document.getElementsByName("boothnumber")[0];		
		if(boothnumber.value==""||boothnumber.value==null)
		{
		  alert("请输入该公司展位号！");
		  boothnumber.focus();
	      return false;
		}
		
		var companyname = document.getElementsByName("companyname")[0];		
		if(companyname.value==""||companyname.value==null)
		{
		  alert("请输入公司名称！");
		  companyname.focus();
	      return false;
		}
				
		var regaddress = document.getElementsByName("regaddress")[0];		
		if(regaddress.value==""||regaddress.value==null)
		{
		  alert("请输入注册地址！");
		  regaddress.focus();
	      return false;
		}
		
		if($("countryid").length != 0 && $("countryid").options[$("countryid").options.selectedIndex].value=="0")
		{
		   window.alert("请选择国家");
		   $("countryid").focus();
		   return false;
		}
				
		if($("provinceid").length != 0 && $("provinceid").options[$("provinceid").options.selectedIndex].value=="0")
		{
		   window.alert("请选择省份");
		   $("provinceid").focus();
		   return false;
		} 
		
		if($("tradeid").length != 0 && $("tradeid").options[$("tradeid").options.selectedIndex].value=="0")
		{
		   window.alert("请选择行业");
		   $("tradeid").focus();
		   return false;
		}
		
				
		var contens = document.getElementsByName("mainproductserve")[0];
		if(contens.value.length>50)
		{
		  alert("主营产品或服务内容不能超过50个字符！");
		  contens.focus();
	      return false;
		}
			
		
		var corpintroduce = document.getElementsByName("corpintroduce")[0];
		if(corpintroduce.value.length>1000)
		{
		  alert("企业简介内容不能超过1000个字符！");
		  corpintroduce.focus();
	      return false;
		}
	
				
		if($("corptypeid").length != 0 && $("corptypeid").options[$("corptypeid").options.selectedIndex].value=="0")
		{
		   window.alert("请选择企业类型");
		   $("corptypeid").focus();
		   return false;
		}
		
		var linkman = document.getElementsByName("linkman")[0];		
		if(linkman.value==""||linkman.value==null)
		{
		  alert("请填写联系人！");
		  linkman.focus();
	      return false;
		}
		
		var address = document.getElementsByName("address")[0];		
		if(address.value==""||address.value==null)
		{
		  alert("请填写地址！");
		  address.focus();
	      return false;
		}
		
		var post = document.getElementsByName("post")[0];		
		if(post.value==""||post.value==null)
		{
		  alert("请填写邮政编码！");
		  post.focus();
	      return false;
		}
		
		var email = document.getElementsByName("email")[0];		
		if(email.value==""||email.value==null)
		{
		  alert("请填写E-mail！");
		  email.focus();
	      return false;
		}
		
		if(!isEmail(email.value))
		{
		  alert("E-mail格式有误,请重新输入！");
		  email.focus();
	      return false;
		}
		
		var telbase = document.getElementsByName("tel")[0];		
		if(telbase.value==""||telbase.value==null)
		{
		  alert("请填写电话！");
		  telbase.focus();
	      return false;
		}
		



		var validnum =document.getElementsByName("validnum")[0];
		if(validnum.value==""||validnum.value==null)
		{
		  alert("请输入验证码！");
		  validnum.focus();
	          return false;
		}
		 var name =$("username").value;
		 ///getUserClass.getCheckUserByName(name,processResponse); alert(name);
		 //if(confirm("确定提交吗？")){
		 //  form.submit();
		// }else{
		//  return false;
		// }
		form.submit();
	}
	function processResponse(data)
	{	alert(data);
		if(data&&confirm("确定提交吗？")){
		 form.submit();
		}
		else{		
		alert("该用户名已经注册,请换另一个用户名");
		return false;
        }	
     }
	
	
   function isEmail(email)
	{
	    String.prototype.Trim  = function(){return this.replace(/^\s+|\s+$/g,"");}
	    email = email.Trim();
	    if(email != null && email != "" && email.length > 0)
	    {
	        var pattern = /^([\w-])+@([\w-])+(\.[\w-])+/;
	        var  flag = pattern.test(email);
	        return flag;
	    }
	    return true;
	}
	
	function username_invalid(name) {
	String.prototype.Trim  = function(){return this.replace(/^\s+|\s+$/g,"");}
	name = name.Trim();
	if(name != null && name != "" && name.length > 0)
	    {
	        var pattern = /^[a-zA-Z][a-zA-Z0-9_\-]{2,19}[A-Za-z0-9_]$/;
	        var  flag = pattern.test(name);
	        return flag;
	    }
	return false;
   }
   
    function refreshImagesShow(){
   var img = document.getElementById("img1");
   img.src='/ibooth/servlet/ImageShowServlet';   
   }