function submit_form() {
try{

var name = document.getElementById('name').value;
var address = document.getElementById('address').value;
var contact = document.getElementById('contact').value;
var position = document.getElementById('position').value;
var phone = document.getElementById('phone').value
var mobile_phone = document.getElementById('mobile_phone').value;
var email = document.getElementById('email').value;
	var err = "";
	if (!validate(email))
		err += 'Invalid email address\n';
	if (name=="") 
		err += 'Invalid Name\n';
	if (address=="")
		err += 'Invalid address\n';
	if (contact=="")
		err += 'Invalid contact\n';
	if (position=="")
		err += 'Invalid position\n';
	if (phone=="")
		err += 'Invalid phone\n';
	if (mobile_phone=="")
		err += 'Invalid mobile_phone\n';
		
	if (err == ""){
		document.form1.submit();
		}
	else
		alert(err);
	}catch(e){alert(e);}	
}

function validate(email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
      return reg.test(email);
}