function isNumberKey(evt)
{
 var charCode = (evt.which) ? evt.which : event.keyCode
 if (charCode > 31 && (charCode < 48 || charCode > 57))
 {
     alert("Please enter valid contact numbers");
    return false;
}
}
 
 
function check()
 {
	var s=document.contact_us;
	 
	
	if(s.tit.value=="select")
	{
	alert ("Please select your title");
	s.tit.focus()
	return false;
	}
	
	
	if(s.f_name.value=="")
	{
	alert ("Please enter your name");
	s.f_name.focus()
	return false;
	}
	 
	if(s.cont_no.value=="")
	{
	alert ("Please enter your valid contact number");
	s.cont_no.focus()
	return false;
	}
	
	
	if(s.email.value=="")
	{
	alert ("Please enter your E-mail address");
	s.email.focus()
	return false;
	}
	 
	 if (s.email.value.indexOf("@")<1 ||
    	s.email.value.indexOf(".")==-1 ||
    	s.email.value.indexOf(",")!=-1 ||
    	s.email.value.indexOf(" ")!=-1 ||
    	s.email.value.length<6)
  {
    alert("Please enter a valid E-mail address.\n" +
    "Example: name@gmail.com");
     s.email.focus();
     return false;
  }
 
 
   	
	if(s.subject.value=="")
	{
	alert ("Please enter the subject");
	s.subject.focus()
	return false;
	}
	 
	if(s.comments.value=="")
	{
	alert ("Please enter your comments");
	s.comments.focus()
	return false;
	}
   
	 return true;

	
}