function robocop_check(obj) {
	// Reset previous clicks
	var checked_images_ok = getElementsByClassName(document.getElementById("robocop_container"), "img", "roboimg_selected_ok");
	var checked_images_error = getElementsByClassName(document.getElementById("robocop_container"), "img", "roboimg_selected_error");
	for (var i=0; i < checked_images_ok.length; i++) {
		checked_images_ok[i].className = "roboimg";
	}
	for (var i=0; i < checked_images_error.length; i++) {
		checked_images_error[i].className = "roboimg";
	}

	var click_value = obj.getAttribute("alt");
	var check_img = document.getElementById("compare_pic");
	var check_value = check_img.getAttribute("alt");
	var robocop = document.getElementById("robocop");
	robocop.value = click_value;

	if (check_value == click_value) {
		obj.className = "roboimg_selected_ok";
	} else {
		obj.className = "roboimg_selected_error";
	}
}

function send_robo() {
	if (checkform()) {
	var robocop = document.getElementById("robocop");
		var check_img = document.getElementById("compare_pic");
		var check_value = check_img.getAttribute("alt");
		if (check_value == robocop.value) {
			document.forms["kommentar_formular"].submit();
		} else {
			alert("Robocop siger: Du skal vælge det rigtige billede!");
		}
	}
}

function toggle( targetId ){
  if (document.getElementById){
  		target = document.getElementById( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} else {
  				target.style.display = "none";
  			}
  	}
}


/*
    getElementsByClassName
    Written by Jonathan Snook, http://www.snook.ca/jonathan
    Add-ons by Robert Nyman, http://www.robertnyman.com
*/

function getElementsByClassName(oElm, strTagName, oClassNames){
    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    var arrRegExpClassNames = new Array();
    if(typeof oClassNames == "object"){
        for(var i=0; i<oClassNames.length; i++){
            arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames[i].replace(/\-/g, "\\-") + "(\\s|$)"));
        }
    }
    else{
        arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames.replace(/\-/g, "\\-") + "(\\s|$)"));
    }
    var oElement;
    var bMatchesAll;
    for(var j=0; j<arrElements.length; j++){
        oElement = arrElements[j];
        bMatchesAll = true;
        for(var k=0; k<arrRegExpClassNames.length; k++){
            if(!arrRegExpClassNames[k].test(oElement.className)){
                bMatchesAll = false;
                break;                      
            }
        }
        if(bMatchesAll){
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements)
}

ns4 = (document.layers);
ie4 = (document.all);