function check()
	{
	  var name=document.check_in.name.value;
	   var applicant_name=document.check_in.applicant_name.value;
	   var address=document.check_in.address.value;
	   var number=document.check_in.number.value;
	   var number2=document.check_in.number2.value;
	   var number3=document.check_in.number3.value;
	   var fax=document.check_in.fax.value;
	   var fax2=document.check_in.fax2.value;
	   var fax3=document.check_in.fax3.value;
	   var email=document.check_in.email.value;
	   var title=document.check_in.title.value;
	   
	   if(name=="")
	   {
	     alert('Please Write name');
		 document.check_in.name.focus();
		 return false;
	   }  	
	   
	   
	   if(applicant_name=="")
	   {
	     alert('Please Write Company_name');
		 document.check_in.applicant_name.focus();
		 return false;
	   } 	      
	   
	   
	   if(address=="")
	   {
	     alert('Please Write address');
		 document.check_in.address.focus();
		 return false;
	   } 
	   
	   if(number=="")
	   {
	     alert('Please Write number');
		 document.check_in.number.focus();
		 return false;
	   } 	   
	   
	   if(number2=="")
	   {
	     alert('Please Write number');
		 document.check_in.number2.focus();
		 return false;
	   } 	   

	   if(number3=="")
	   {
	     alert('Please Write number');
		 document.check_in.number3.focus();
		 return false;
	   } 	   
	   
	   if(fax=="")
	   {
	     alert('Please Write fax');
		 document.check_in.fax.focus();
		 return false;
	   }
	   

	   if(fax2=="")
	   {
	     alert('Please Write fax');
		 document.check_in.fax2.focus();
		 return false;
	   } 	   
	   
	   if(fax3=="")
	   {
	     alert('Please Write fax');
		 document.check_in.fax3.focus();
		 return false;
	   }	   
	   


 
	   
	   	   if(email=="")
	   {
	     alert('Please Write email');
		 document.check_in.email.focus();
		 return false;
	   }  

	   
	   	   if(title=="")
	   {
	     alert('Please Write title');
		 document.check_in.title.focus();
		 return false;
	   }  	   
	   	   
	    function enter() {
  		if(event.keyCode == 13) {
    	denglu();
		}
	}	   
	}