// mouse over functies zetten
function setHoverFunction(sId, sTextHover) {
	if (document.getElementById) {
		var t = document.getElementById(sId);
		t.sId = sId;
		t.sTextHover = sTextHover;
		t.sTextNormal = t.innerHTML;
		
		t.onmouseover = function() {
			changeText(this.sId, this.sTextHover);
		}
		t.onmouseout = function() {
			changeText(this.sId, this.sTextNormal);
		}
	}
}

function changeText(sId, sText) {
	if (document.getElementById) {
		var t = document.getElementById(sId);
		
		if (t.innerHTML != sText) {
			t.innerHTML = sText;
		}
	}
}