// JavaScript Document
function set_cookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function get_cookie(name) {
    var name_eq = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(name_eq) == 0) return c.substring(name_eq.length,c.length);
    }
    return null;
}


if(get_cookie("page_size") != null){   
    document.write('<style>');
    document.write('body{');
    document.write('font-size:'+ get_cookie("page_size") + 'em');
    document.write('}');
    document.write('</style>')
}else{
    document.write('<style>');
    document.write('body{');
    document.write('font-size: 1em');
    document.write('}');
    document.write('</style>')   
}

function validateAmount(amount){
	if(amount.value.match( /^[0-9]+(\.([0-9]+))?$/)){
		return true;
	}else{
		alert('You must enter a valid donation.');
		amount.focus();
		return false;
	}
}

function checkEmail(emailAddress) {
//	var email = document.getElementById(emailAddress);
	var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(emailAddress.value)) {
		alert('Please provide a valid email address');
		emailAddress.focus
		return false;
	}
}