var d = document;
var bilder = ['img/bg_freund.gif','img/bg_kontakt.gif', 'img/bg_sende.gif', 'img/bg_veran.gif', 'img/bg_verein.gif', 'img/faceico-cl.png', 'img/spaceico-cl.png', 'img/studiico-cl.png', 'img/twittico-cl.png'];

function pre() {
	for(i = 0; i < bilder.length; i++) {
		var tmp = new Image();
		tmp.src = bilder[i];
	}
}

function proof() {
	var form = document.kont;
	var error = "Bitte denk an die Sternchen (*), es fehlen noch:\n";

	if(form.vname.value == "") { error += "* Dein Name\n" }
	if(form.mail.value == "") { error += "* Deine E-Mail\n" }
	if(form.nach.value == "") { error += "* Deine Nachricht an uns\n" }

	if(error != "Bitte denk an die Sternchen (*), es fehlen noch:\n") {
		alert(error);
		return false;
	} else {
		return true;
	}
}

function socialhigh(layer) {
	d.getElementById("socialname").innerHTML = d.getElementById(layer).getAttribute('title');
	d.getElementById(layer).src = "img/" + layer + "-cl.png";
}

function sociallow(layer) {
d.getElementById("socialname").innerHTML = "";
	d.getElementById(layer).src = "img/" + layer + "-sw.png";
}