/* 
JavaScript Document 
AUTHOR: MATT COOPER FOR FLIGHT PATH CREATIVE
*/
function validate_required(field)
{
	with (field)
	{
		if (value==null||value=="")
		{
			return false;
		} else {
			field.focus();
			return true;
		}
	}
}
function validate_expression(field, expr)
{
	var ex = '';
	switch (expr) {
		case 'alpha':
			ex = /^[a-zA-Z ]+$/;
			break;
		case 'number':
			ex  = /^[0-9]+$/;
			break;
		case 'alphanum':		
			ex = /^[0-9a-zA-Z ]+$/;
			break;
		case 'email':
			ex = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-Z0-9]{2,4}$/;	
			break;
		default: // alpha
			ex = /^[a-zA-Z ]+$/;
			break;
	}

	var val = field.value.replace(/ /,'');
	if (val.match(ex)) {
		return true;	
	} else {
		field.focus();
		return false;
	}
}

function compare_values(field_a, field_b) {
	if (field_a.value == field_b.value) {
		return true;
	} else {
		field_a.focus();
		return false;
	}
}


function confirm_delete(obj_name, id, page) {
	if (confirm("Are you sure you want to delete " + obj_name + "?")) {
		window.location.href = page + "?id=" + id + "&action=remove";
	}
}

function detect_ie() {
	var ver = 0;
	var msg = '';
	var ua = navigator.userAgent;
	var av = navigator.appVersion;
	if (ua != null)
	{
		if (ua.indexOf("MSIE") != -1)
		{
			if (av.indexOf("MSIE")!=-1){
				var temp=av.split("MSIE");
				ver=parseFloat(temp[1]);
			}
		}
	}
	return ver;
}

function doHover(elem, i, enabled)
{
	if(enabled != 0)
	{
		if(i == 0)
		{
			document.getElementById(elem).className = 'main-nav-off';
		} else {
			document.getElementById(elem).className = 'main-nav-on';
		}
	}
}

function doHoverBtn(elem, i)
{
	if(i == 0)
	{
		document.getElementById(elem).className = 'button-off';
	} else {
		document.getElementById(elem).className = 'button-on';
	}
}

function doHoverBtny(elem, i)
{
	if(i == 0)
	{
		document.getElementById(elem).className = 'button-y';
	} else {
		document.getElementById(elem).className = 'button-on';
	}
}

function checkContact()
{
	var retval = true;
	var msg = '';
	var cName = document.getElementById('contact_name');
	var cEmail = document.getElementById('contact_email');
	
	if(!validate_required(cName) || !validate_expression(cName, 'alphanum'))
	{
		retval = false;
		document.getElementById('contact_name').focus();
		msg = msg + 'Please enter your name.';
	}
	if(!validate_required(cEmail) || !validate_expression(cEmail, 'email'))
	{
		retval = false;
		document.getElementById('contact_email').focus();
		msg = msg + 'Please enter your complete email address.';
	}
	
	if(msg.length > 0)
	{
		alert(msg);
	}
	
	
	return retval;
}
function togglePrice(form) {
	if(form.downloadable) {
		if(form.download.checked) {
			form.price.value = form.download_price.value;
			document.getElementById('prodPrice').innerHTML = form.download_price.value;
		} else {
			form.price.value = form.standard_price.value;
			document.getElementById('prodPrice').innerHTML = form.standard_price.value;
		}
	}
}