function register(){
	var regForm = document.getElementById('member-form');
	var regexp = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
	
	if(regForm){
		if(regForm['email'].value.replace(/\s+/g,"").length == 0){
			alert('Please enter your email !');
			regForm['email'].focus();
		}
		else if(regForm['email'].value.search(regexp) == -1)
		{
			alert('Please enter valid email address ! ');
			regForm['email'].focus();
		}	
		else if(regForm['username'].value.replace(/\s+/g,"").length == 0){
			alert('Please enter your username !');
			regForm['username'].focus();
		}
		else if(regForm['password'].value.replace(/\s+/g,"").length == 0){
			alert('Please enter your password !');
			regForm['password'].focus();
		}
		else{
			regForm.submit();
		}
	}
}