function check_empty() {
	if(document.frm.YMP0.value=='') {
		alert('Please enter your email address');
		document.frm.YMP0.focus();
		return false;
	}	
	if(document.frm.YMP1.value=='') {
		alert('Please enter your name');
		document.frm.YMP1.focus();
		return false;
	}

}