function strstr( haystack, needle, bool ) {
    var pos = 0;
    haystack += '';
    pos = haystack.indexOf( needle );
    if( pos == -1 ){
        return false;
    } else{
        if( bool ){
            return haystack.substr( 0, pos );
        } else{
            return haystack.slice( pos );
        }
    }
}

var OpenLinks = new Class({
	//initialization
	initialize: function(file_extensions,override_targets,target,no_class) {
		//analyze all anchors
		$$('a').each(function(el) {
		
			//check each href for case-insensitive file extensions
			var str = el.get('href');
			var ext = str.substring(str.lastIndexOf('.') + 1,str.length);
			if(strstr(str, 'http') || file_extensions.contains(ext.toLowerCase()) && ((override_targets || !el.get('target')) && !el.hasClass(no_class + '')))
			{
				el.setProperty('target',target ? target : '_blank');
			}
		});
	}
});


window.addEvent('domready', function() {
	
	var olinks = new OpenLinks(['doc','pdf','xls','jpg','gif','png', 'pps', 'ppt', 'zip', 'swf', 'gif', 'doc'],1,'_blank','no-target');
	
	
	if ($chk($('captcha_img'))) {
		$('reload_captcha').addEvent('click', function(e){
			reload_captcha();
			return false;
		});
	}
	
});

var c = 0
var reload_captcha = function() {
	c = c + 1;
	var src = $('reload_captcha').get('href');
	$('captcha_img').dispose();
	
	var newcha = new Element('img', {
		'id': 'captcha_img',
		'src': src + '/' + c,
		'alt': 'captcha'
    });
	newcha.inject('cha', 'top');
}