window.onload = function() {  
    
    window.kwdSearchResultCallback = {};
    
    if(typeof(kwdSearchParams) === "undefined" ) {
        window.kwdSearchParams = {};
    }
    
    if(typeof(kwdSearchParams['global']) === "undefined" ) {
        window.kwdSearchParams['global'] = {};
    }
    
    for(var i=0; i < 10; i++) {
        var elementId = 'kwdsearch-'+i;
        
        var element = document.getElementById(elementId);
        
        if(element == null) {
            continue;
        }
        
        if(!kwdSearchParams.hasOwnProperty(elementId)) {
            kwdSearchParams[elementId] = {};
        }
        
        
        
        var keywordsTmp = element.textContent;
        var arrKeywords = keywordsTmp.split(',');
        // select a random entry
        var keyword     = arrKeywords[Math.floor(Math.random()*arrKeywords.length)];
        element.innerHTML = '<img src="http://erkaeltung.de/search/html/loading.gif" width="16" height="16" title="Loading search results" alt="Loading search results..." />';
        
        var requestUrl = 'http://erkaeltung.de/search/search.php?keyword='+escape(keyword)+'&displayFormat=js&ajax=1&elementId='+elementId;
        for(property in kwdSearchParams[elementId]) {
            if(property === 'displayFormat' || property == 'displayInline') {
                continue;
            }
            requestUrl = requestUrl+'&'+property+'='+kwdSearchParams[elementId][property];
        }
        kwdSearchMakeRequest(requestUrl, element);
    }
    
    function kwdSearchMakeRequest(url, element) {  
        var head = document.getElementsByTagName("head")[0] || document.documentElement;
        var additionalScript = document.createElement('script');
        additionalScript.setAttribute('src', url);
        
        var done = false;
        
        // load callback after execution
        additionalScript.onload = additionalScript.onreadystatechange = function() {
            
            if ( !done && (!this.readyState ||
                this.readyState === "loaded" || this.readyState === "complete") ) {
                done = true;
                // Handle memory leak in IE
                additionalScript.onload = additionalScript.onreadystatechange = null;
                if ( head && additionalScript.parentNode ) {
                    head.removeChild( additionalScript );
                }

                var elementId = element.getAttribute('id');
                if(typeof(kwdSearchResultCallback[elementId]) !== 'undefined') {
                    // callback
                    kwdSearchResultCallback[elementId]();
                } else if(typeof(kwdSearchParams[elementId]['callbackOnFail']) !== 'undefined') {
                    kwdSearchParams[elementId]['callbackOnFail'](element, kwdSearchResults[elementId]);
                }
            }
                
        }
        
        // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
        // This arises when a base node is used (#2709 and #4378).
        head.insertBefore( additionalScript, head.firstChild );

    }  
  
};