window.onload = window.onresize = resize;

function resize () {
    obj_mainnavactive = document.getElementById('mainnavactive');
    if (obj_mainnavactive){
        col_subnav = obj_mainnavactive.getElementsByTagName('ul');
        if (col_subnav.length>0){
            obj_subnav = col_subnav[0];
            mainnavactive_left = document.getElementById('nav').offsetLeft + obj_mainnavactive.offsetLeft;
            mainnavactive_width = obj_mainnavactive.offsetWidth;
            subnav_failwidth = (mainnavactive_left + mainnavactive_width + obj_subnav.offsetWidth) - document.body.offsetWidth;
            if (obj_subnav.offsetLeft>-17){
                if (subnav_failwidth>0){
                    if (subnav_failwidth>mainnavactive_width){
                        obj_subnav.className = 'right0';
                    }
                    else{
                        obj_subnav.className = 'left0';
                    }
                }
            }
            else if (obj_subnav.offsetLeft==-17){
                if (subnav_failwidth>0) {
                    if (subnav_failwidth>mainnavactive_width){
                        obj_subnav.className = 'right0';
                    }
                }
                else {
                    obj_subnav.className = '';
                }
            }
            else {
                if (subnav_failwidth>0) {
                    if (subnav_failwidth<=mainnavactive_width){
                        obj_subnav.className = 'left0';
                    }
                }
                else {
                    obj_subnav.className = '';
                }
            }
        }
    }
}


function getAdr(prefix, postfix, text) {
        document.write('<a href="mailto:' + prefix + '@' + postfix + '">' + (text ? text : prefix + '@' + postfix) + '</a>');
}

function swapImage(element, newimage) {
	var oldsrc = element.src
	element.src = newimage
	if (!element.onmouseout)
		element.onmouseout = function (event) { swapImage(this, oldsrc); };
}

var sel;
function HideSelects(x,y,w,h) {
	if(xIE4Up && !xMac) {
		var selx, sely, selw, selh, i
		if(!sel)
			sel = document.getElementsByTagName("SELECT");
		for(i = 0; i < sel.length; i++) {
			selx = xPageX(sel[i]);
			sely = xPageY(sel[i]);
			selw = sel[i].offsetWidth;
			selh = sel[i].offsetHeight;
			sel[i].style.visibility = (selx + selw > x && selx < x + w && sely + selh > y && sely < y + h) ? "hidden" : "visible";
		}
	}
}


// Leerzeichen hinten und vorne bei einem String Objekt wegschneiden
function trim(string) {
	return string.replace(/^\s*|\s*$/,'');
}

function checkEmail(val) {
	if (val) {
		var usr = "([a-zA-Z0-9][a-zA-Z0-9_.-]*|\"([^\\\\\x80-\xff\015\012\"]|\\\\[^\x80-\xff])+\")";
		var domain = "([a-zA-Z0-9][a-zA-Z0-9._-]*\\.)*[a-zA-Z0-9][a-zA-Z0-9._-]*\\.[a-zA-Z]{2,5}";
		var regex = "^"+usr+"\@"+domain+"$";
		var myrxp = new RegExp(regex);
		var check = (myrxp.test(val));
		if (check!=true) {
			return false;
		}
		else {
			return true;
		}
	}
}

/*
validates formfields if they have a value or not
to check for other options do the following
specialfields = new Object();
specialfields.fieldname = new Object();
specialfields.fieldname.check1 = 'function_to_call,error_message';
specialfields.fieldname.check2 = 'second_function_to_call,second_error_message';
specialfields.another_fieldname = new Object();
specialfields.another_fieldname.check1 = 'function_to_call,error_message';
*/
function validateForm(form,specialfields) {
	var errors = new Array();
	var fields = form.getElementsByTagName('label');
	for (i = 0; i < fields.length; i++) {
		var span = fields[i].getElementsByTagName('span')[0];
		if (span) {
			var label = span.firstChild.data;
			label = label.replace(/^\s*/, '');
			label = label.replace(/\s*$/, '');
			// if there is a '*' in the label - this indicates the inputfield to have to be filled
			if (label.charAt(label.length - 1) == '*'){
				// get the inputfield
				var obj_input = fields[i].getElementsByTagName('input');
				if (!obj_input[0]){
					obj_input = fields[i].getElementsByTagName('select');
				}
				if (!obj_input[0]){
					obj_input = fields[i].getElementsByTagName('textarea');
				}
				// if there is an inputfield
				if (obj_input && obj_input[0]){
					input = obj_input[0];
					error = false;
					
					// check if the inputfield has a value
					if (!input.value || trim(input.value).length==0) {
						error = true;
						errors.push(label.substring(0, label.length -1) + ' nicht eingegeben');
					}
					
					// check the inputfield for special things (email, ...)
					if (!error && specialfields[input.name]){
						specialfield = specialfields[input.name];
						for (check in specialfield){
							check_function = specialfield[check].split(',')[0];
							check_message = specialfield[check].split(',')[1];
							if (!eval(check_function)(input.value)){
								error = true;
								errors.push(label.substring(0, label.length -1) + check_message);
							}
						}
					}
		            
					// on error give the label the className 'error' otherwise delete the className 'error' (if exists)
					if (error){
						className = fields[i].className;
						if (className.length>0){
							className = className + ' ';
						}
						fields[i].className = className + 'error';
					}
					else {
		            	className = fields[i].className;
		                if (className.indexOf('error')>-1){
							className = className.replace(' error', '');
							className = className.replace('error', '');
							fields[i].className = className;
						}
		            }
				}
			}
		}
	}
    return errors;
}

function showFormErrors (errors) {
	error_message = '';
	for (i=0;i<errors.length;i++){
		error_message += errors[i] + '\n';
	}
	alert(error_message);
}

function search_submit(obj) {
    if (obj.value!=''){
        return true;
    }
    else {
        return false;
    }
}