function checkvaliditylink(defaulthost) {
var link = document.getElementById("download_link").value;
var error = 0;
	if (defaulthost == link || link == '') error = 1;
	else {
	}
	if (error > 0) {
	document.getElementById('error').innerHTML = document.getElementById('error' + error).value + "gg";
	$(".error").blink({
	speed: 200,
	blinks: 5
	});

	return false;
	}
	return true;
}

/*
jQuery Blink
Author: WonderGroup, Jordan Thomas
URL: http://labs.wondergroup.com/demos/mini-ui/index.html
License: MIT (http://en.wikipedia.org/wiki/MIT_License)
*/
jQuery.fn.blink=function(o){var d={speed:200,blinks:3,callback:null};var o=jQuery.extend(d,o);return this.each(function(){var calls=0;for(i=1;i<=o.blinks;i++){$(this).animate({opacity:0},o.speed).animate({opacity:1},o.speed,function(){calls++;if(calls==o.blinks&&jQuery.isFunction(o.callback)){o.callback();}});}});};