function change_benefit(imagename){
	var a = document.getElementById("benefit");	
	a.src = "images/00_index/" + imagename
}

var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i

function checkmail(e){
   var returnval=emailfilter.test(e.value)
   return returnval;
}

function check_applyform() { 

   var s_company = document.getElementById("company");
   var s_contact_person = document.getElementById("contact_person");
   var s_tel = document.getElementById("tel");
   var s_email = document.getElementById("email");
   var error_str = "";
   var phoneno = "";
   phoneno = s_tel.value.replace(/ /g,"");
   phoneno = phoneno.replace(/-/g,"");

   if ( s_company.value == "" ) { 
   	error_str += "Please fill in company name\n";
   }
   if ( s_contact_person.value == "" ) { 
   	error_str += "Please fill in contact person\n";
   }
   if ( phoneno == "" ) { 
   	error_str += "Please fill in phone number\n";
   }else if ( isNaN(phoneno)  ) {
   	error_str += "Incorrect Phone number format\n";
   }
   if ( s_email.value == "" ) { 
   	error_str += "Please fill in email address\n";
   }
   if ( s_email.value != "" && checkmail(s_email) == false ){ 
        error_str += "Incorrect email format\n"
   }
   if ( (document.app.qq1[0].checked == false) && (document.app.qq1[1].checked == false) ){ 
        error_str += "Please answer question 1\n"
   }
   if ( (document.app.qq2[0].checked == false) && (document.app.qq2[1].checked == false) ){ 
        error_str += "Please answer question 2\n"
   }
   
   if ( error_str != ""){ 
   	alert(error_str);
   } else {
        document.getElementById("app").submit();
   }
   
   return false;
}


function resetform(formid){
	
	document.getElementById(formid).reset();
	
}