// JavaScript Document
function change_corner_bottom(){
	if (!document.getElementById('last_navi_item')){
		document.getElementById('navi_corners').style.backgroundPosition='left bottom';													 
	}else {
			document.getElementById('navi_corners').style.backgroundPosition='left top';
	}
}

function chk_email_is_empty(fld_id){
	var email= document.getElementById('email');
	if (email.value=='Ihre E-Mail-Adresse'){
		email.value='';	
	}else if (email.value==''){
		email.value='Ihre E-Mail-Adresse';
	}
}


if(typeof(DD)=="undefined"){
	var DD = new Object();
}
DD.validation = new Object();

DD.validation.clearValue=function(callObj,defVal,act){
	if(act && callObj.value==defVal){
		callObj.value="";
	}else if(!act && !callObj.value){
		callObj.value=defVal;
	}
}

DD.validation.tt_address_form = function(callObj,autoSubmit){
	if(document.getElementById("username") && chkText(document.getElementById("username"),"Namen","Ihren")==false)return false;
	if(chkEmail(document.getElementById("email"),"E-Mail-Adresse","die")==false)return false;
	if(autoSubmit) {
		callObj.submit();
	}
}

function chkEmail(fname, ftext,stext){
	if (fname.value.length > 0){
		var x = fname.value;
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		if (!filter.test(x)){
			alert("Bitte geben Sie " + stext + " korrekte " + ftext +" ein!");
			fname.focus();
			return false;
		}
	} else {
		alert("Bitte geben Sie " + stext + " " + ftext + " ein!");
		fname.focus();
		return false;
	}
}

function chkText(fname,ftext,stext){
	if (!fname.value){
		alert("Bitte geben Sie " + stext + " " +  ftext + " ein!");
		fname.focus();
		return false;
	}
}