// hide and show divs an change link values accordingly
function toggleVisibility(arg, arg2)  {

	var obj = document.getElementById(arg);
		
	// hide-show object
	if (obj.style.display == "") {
		obj.style.display = "none";
	}
	else if (obj.style.display == "none") {
		obj.style.display = "";
	}
	
	// change the link values
	if (null != arg2) {
		
		var obj2 = document.getElementById(arg2);
				
		if (obj2.innerHTML == "Toon routebeschrijving") {
			obj2.innerHTML = "Verberg routebeschrijving";
		}
		else {
			obj2.innerHTML = "Toon routebeschrijving";
		}
	}
}

// print the contents of a div

function printPopup(url, id) {

    var content = "";
	
    if (null != document.getElementById) {
        if (null != document.getElementById(id)) {
            content = document.getElementById(id).innerHTML;
         }
    }
    
    var printWin = window.open(url,name);
    //printWin.document.open();
    
    /* alert(printWin.document);
     var cont = printWin.getElementById("content");
    alert(cont.innerHTML);
     cont.innerHTML = content;
    printWin.document.close();
   */
    printWin.print();   
}


function checkfrm() {
	if(document.getElementById("naam").value=="") {
		alert("Vergeet niet uw naam in te vullen!");
		document.getElementById("naam").focus();
		return false;
	}
	if(document.getElementById("email").value=="") {
		alert("Vergeet niet een E-mail adres in te vullen!");
		document.getElementById("email").focus();
		return false;
	}
	var regx  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (! regx.test(document.getElementById("email").value) ) {
	  alert("Het ingevulde E-mailadres is ongeldig, probeer het nog eens!");
	  document.getElementById("email").focus();
		  return false; 	  
	}
	return true;
}