// validate.js
// by Nick Stone
// nick-stone.com
// created 2008/05/27 
// updated 


// This library contains:
// 1. Event Handler registration for submit button.
// It is called only when contact.php loads 
// to validate form entries on client side prior to PHP validation


window.onload=function () 
	{
	// --------------------------------------------
	//

	if (document.getElementById("send2antec"))
		{
		// initialize submit button event handler
		setHandlers()
		}
	}

////////////////////////////////////////////////////////////////////

//
// 			SET EVENT HANDLERS
//
//

function setHandlers() 
{
	document.getElementById("send2antec").onclick=checkForm;
	document.getElementById("send2antec").onkeypress=checkForm;
}


////////////////////////////////////////////////////////////////////



function checkForm()
{
	if(document.getElementById('inquiry'))
	{	
			var cname, cemail, cphone, ccomments;
			var form = document.getElementById('inquiry');
			cname    = form.vname;
			cemail   = form.vemail;
			cphone = form.phone;
			ccomments = form.comments;


		if(trim(cname.value) == '')
		{
			alert('Please enter your name');
			cname.focus();
			return false;
		}
		else if(trim(cemail.value) == '')
		{
			alert('Please enter your email');
			cemail.focus();
			return false;
		}
		else if(!isEmail(trim(cemail.value)))
		{
			alert('Email address is not valid');
			cemail.focus();
			return false;
		}
		else if(trim(cphone.value).length < 9) 
		{
			alert('Please enter your phone number\nincluding area code\nxxx-xxx-xxxx');
			cphone.focus();
			return false;
		}
		else if(trim(ccomments.value) == ':')
		{
			alert('Care to include a short message?');
			ccomments.focus();
			return false;
		}
		else
		{
			cname.value    = trim(cname.value);
			cemail.value   = trim(cemail.value);
			cphone.value =  trim(cphone.value);
			ccomments.value    = trim(ccomments.value);
			return true;
		}

	}
	
}

/*
Strip whitespace from the beginning and end of a string
Input : a string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

/*
Check if a string is in valid email format. 
Returns true if valid, false otherwise.
*/
function isEmail(str)
{
	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}