// JavaScript Document
function SMS(){

	var msisdn		= document.getElementById('msisdn');
	var group_id	= document.getElementById('group_id');
	
	var errors = '';

	if (msisdn.value.length < 10){
		errors = errors + 'Please enter your Cellphone Number in the correct format! \nYour number needs to be at least 10 digits long. \n';
		msisdn.focus();
	}

	if (group_id.value.length == 0){
		errors = errors + 'Please enter a Group! \n ';
		group_id.focus();
	}

	if (errors){
		alert(errors); 
		return false;
	} else {
		form.submit();
		return true;
	}

}