function check_form() {
	var fields = new Array("txtReason", "txtEmail");
	var errors = new Array("Please select a subject from the dropdown.", "Please let us know your email address.");
	var frm = document.frmMain;
	for(var i=0; i<fields.length; i++) {
		var field = frm[fields[i]];
		if (field.value.length == 0) {
			alert(errors[i]);
			field.focus();
			return false;
		}
	}
	
	var email = frm['txtEmail'].value;
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(reg.test(email) == false) {
		alert('Please fill in a valid email address.');
		frm['txtEmail'].focus();
		return false;
	}
	

	return true;
}