// JavaScript Document
function form_validation(form){
	//var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	var regEx_email = /^([0-9a-zA-Z]([-\.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$/;
	
	if(form.email.value=='' ){
		alert('Please enter e-mail address');
		form.email.focus();
		return false;
	}
	
	if(form.email.value!='' ){
		if((!regEx_email.test(form.email.value))){
			alert('Please enter valid e-mail address');
			form.email.focus();
			return false;
		}
  	}
	
	return true; 
}