var numb = '0123456789';

var lwr = 'abcdefghijklmnopqrstuvwxyz';

var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

var space = ' ';

function isValidEmail(str) 

{//(str.indexOf(".") >= 2) && (str.indexOf("@") > 0);

   return (str.indexOf("@") > 0);   

}

	

function validateForm(f) 

{	

	//alert('validate form!');

	if (!isValidEmail(f.email.value)) 

	{

		alert("Please enter a valid email address.");

		f.email.focus();

		return false;

	}

	if (f.firstname.value == "")

	{

		alert("Please enter your name");

		f.firstname.focus();

		return false;

	}

	if(!isAlphaNumSpace(f.firstname.value))

	{

		alert("Please only use letters A - Z for your name");

		f.firstname.focus();

		return false;

	}

	return true;

}	



function isValid(parm,val) 

{

if (parm == "") return true;

for (i=0; i<parm.length; i++) 

{

	if (val.indexOf(parm.charAt(i),0) == -1) return false;

}

return true;

}

function isAlphaNumSpace(parm) {return isValid(parm,lwr+upr+numb+space);} 

function isAlphanum(parm) {return isValid(parm,lwr+upr+numb);} 

function isAlpha(parm) {return isValid(parm,lwr+upr);}