function checkValue()
{
	var trefwoord = document.getElementById("trefwoord").value;
	if (trefwoord.length < 3)
		alert("De zoekopdracht moet uit minstens drie tekens bestaan");
	else
		if (trefwoord == "trefwoord |")
			alert("U heeft nog geen trefwoord ingevuld");
		else
			document.getElementById("frmZoeken").submit();
}

function disableEnterKey(e)
{
	 var key;

	 if(window.event)
		  key = window.event.keyCode;     //IE
	 else
		  key = e.which;     //firefox

	 if(key == 13)
		  return false;
	 else
		  return true;
}

var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

function fixPNG(myImage) 
{
	if ((version >= 5.5) && (version < 7) && (document.body.filters)) 
	{
	   var imgID = (myImage.id) ? "id='" + myImage.id + "' " : ""
	   var imgClass = (myImage.className) ? "class='" + myImage.className + "' " : ""
	   var imgTitle = (myImage.title) ? 
					 "title='" + myImage.title  + "' " : "title='" + myImage.alt + "' "
	   var imgStyle = "display:inline-block;" + myImage.style.cssText
	   var strNewHTML = "<span " + imgID + imgClass + imgTitle
				  + " style=\"" + "width:" + myImage.width 
				  + "px; height:" + myImage.height 
				  + "px;" + imgStyle + ";"
				  + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
				  + "(src=\'" + myImage.src + "\', sizingMethod='scale');\"></span>"
	   myImage.outerHTML = strNewHTML	  
	}
}