function randomlinkColor(){
            iMax = 5;
            a = iMax*(Math.random());
			mynum = Math.round(a);

		   var linkColor = new Array();
		   linkColor[0] = "#FF008F";
		   linkColor[1] = "#FF4900";
           linkColor[2] = "#FFC600";
           linkColor[3] = "#41BA00";
           linkColor[4] = "#00B0D5";
		   linkColor[5] = "#6400FF";

           $('.contexthref').css("color",linkColor[mynum]);
		   $('.asterisk').css("color",linkColor[mynum]);
		}


function setNextPreviewImage(mynum, imax){
	var mynum = parseInt(mynum);
	var imax = parseInt(imax);

	if (mynum < imax){
		mynum = mynum + 1;
	}
	else{
		mynum = 1;
	}
	$('#display').css("background-image", "url('_gfx/preview/" + mynum + ".jpg')");
    $('#startpreview').attr("href", "_gfx/fullsize/" + mynum + ".jpg");
}


function setPreviousPreviewImage(mynum, imax){
	var mynum = parseInt(mynum);
	var imax = parseInt(imax);

	if (mynum > 1){
		mynum = mynum - 1;
	}
	else{
		mynum = imax;
	}
	$('#display').css("background-image", "url('_gfx/preview/" + mynum + ".jpg')");
    $('#startpreview').attr("href", "_gfx/fullsize/" + mynum + ".jpg");
}

function setThisPreviewImage(previewId, fullsizeId, mytitle){
	$('#display').css("background-image", "url('/global/show_picture.asp?id=" + previewId + "')");
	$('#startpreview').attr("href", "/global/show_picture.asp?id=" + fullsizeId);
	$('#startpreview').attr("title", mytitle);
}

function ipadseal(){
	var browser = navigator.appVersion;
	if (browser.indexOf('iPad') > -1){
		$('#ipadseal').css('display','block');
		
		$("#ipadseal").animate({opacity:"0.9",top:"0px"}, 1500);
	
	}
}


function checkRequiredFields(input){

    var requiredFields = new Array("vorname", "nachname", "message", "email");
    var fieldNames     = new Array("firstname", "lastname", "message", "email");
    var fieldCheck   = true;

    var fieldsNeeded = "\nYou forgot to fill out the following fields:\n\n\t";
    for(var fieldNum=0; fieldNum < requiredFields.length; fieldNum++) {
        if ((input.elements[requiredFields[fieldNum]].value == "") ||
            (input.elements[requiredFields[fieldNum]].value == " ")) {
            fieldsNeeded += fieldNames[fieldNum] + "\n\t";
            fieldCheck = false;
        }
    }

    if (fieldCheck == true) // written by thomas@smart-sign.com in spring 2K
                            // feel free to borrow and modify this code
                            // but be shure to leave the credit in there ....
    {
		if(input.elements[requiredFields[3]].value.indexOf ("@")<=-1 || input.elements[requiredFields[3]].value.indexOf (".")<=-1){
			alert("Invalid email address!\n\n" +"Please check your input."); return false;
			}
        else {return true;}
    }

    else
    {
        alert(fieldsNeeded);
        return false;
    }


}