function checkform() {
	var d = document.forms.enquiryf;
	
	if (d.txtlname.value=="") {
		alert("Please enter your first or full name");
		d.txtlname.focus();
		return false;
	}
	if (d.txtphone.value=="") {
		alert("Please enter your phone number");
		d.txtphone.focus();
		return false;
	}
	if (d.txtemail.value=="") {
		alert("Please enter your email address");
		d.txtemail.focus();
		return false;
	}
	//validate email address string
	if(d.txtemail.value!="") {
		re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
		
		if (re.test(d.txtemail.value)) {
			return true;
		}
		alert("Invalid email address")
		d.txtemail.focus();
		d.txtemail.select();
		return false;
	}
	
	d.Submit();

}