function imgOn(imgName, imgsrc) {
if (document.images) {
teston = new Image(); 
document[imgName].src =  imgsrc;
}
}

function imgOff(imgName, imgsrc) {
if (document.images) {
testoff = new Image(); 
testoff.src = imgsrc;
document[imgName].src =  testoff.src;
}
}

function preloadImages() {
	if (document.images) {
		preload0 = new Image(160, 45);
		preload0.src ="images/colbox_0_2.gif";
		preload1 = new Image(160, 45);
		preload1.src ="images/colbox_1_2.gif";
		preload2 = new Image(160, 45);
		preload2.src ="images/colbox_2_2.gif";
		preload3 = new Image(160, 45);
		preload3.src ="images/colbox_3_2.gif";
		preload4 = new Image(160, 45);
		preload4.src ="images/colbox_4_2.gif";
	}
}

function checkForm() {
  hideAllErrors() 
  nimi = document.getElementById("yht_nimi").value;
  yritys = document.getElementById("yht_yritys").value;
  puhelin = document.getElementById("yht_puhelin").value;
  email = document.getElementById("yht_email").value;
  	if (nimi == "") {
	document.getElementById("nimi").style.background-color = "#FFF8CB";
	document.getElementById("nimi").select();
	document.getElementById("nimi").focus();
	var sstatus = "false";
	} 
	if (yritys == "") {
	document.getElementById("yritys").style.background-color = "#FFF8CB";
	document.getElementById("yritys").select();
	document.getElementById("yritys").focus();
	var sstatus = "false";
	}
	if (puhelin == "") {
	document.getElementById("puhelin").style.background-color = "#FFF8CB";
	document.getElementById("puhelin").select();
	document.getElementById("puhelin").focus();
	var sstatus = "false";
	}
	if (email == "") {
	document.getElementById("email").style.background-color = "#FFF8CB";
	document.getElementById("email").select();
	document.getElementById("email").focus();
	var sstatus = "false";
	}
	
	if (sstatus == "false") {
		document.getElementById("infoError").style.display = "inline";
		document.getElementById("infoError").style.color = "#FF2A00";
		return false; 
	} else  { return true; }
}
 
function hideAllErrors() {
document.getElementById("infoError").style.display = "none"
}