function applyShadow(targetElement, shadowColor, top, left) {
	  if (typeof(targetElement) != 'object') {
	    targetElement = document.getElementById(targetElement);
	  }
	  var value = targetElement.firstChild.nodeValue;
	  targetElement.style.position = 'relative';
	  targetElement.style.zIndex = 1;
	    
	  var newEl = document.createElement('span');
	  newEl.appendChild(document.createTextNode(value));
	  newEl.className = 'shadowed';
	  newEl.style.color = shadowColor;
	  newEl.style.position = 'absolute';
	  newEl.style.left = left + 'px';
	  newEl.style.top = top + 'px';
	  newEl.style.zIndex = -1;
	  
	  targetElement.appendChild(newEl); 
}

function editInput(target, event, waarde)
{
	$(target).css("color", "#000");
	
	if (event == "blur")
	{
		if (target.value == "")
		{ 
		 	target.value = waarde; 
			$(target).css("color", "#C0C0C0");
			$(target).css("border", "2px solid transparent"); 
		}		
	}
	else
	{
		if (target.value == waarde) 
		{ 
			target.value = ""; 
			$(target).css("color", "#000");
			$(target).css("border", "2px solid #555");
		}
	}
}

function isEmail(str) 
{
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	
	if (str.indexOf(at)==-1)
	{
	   return false;
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr)
	{
	   return false;
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr)
	{
	    return false;
	}

	 if (str.indexOf(at,(lat+1))!=-1)
	 {
	    return false;
	 }

	 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot)
	 {
	    return false;
	 }

	 if (str.indexOf(dot,(lat+2))==-1)
	 {
	    return false;
	 }
	
	 if (str.indexOf(" ")!=-1)
	 {
	    return false;
	 }

	 return true;					
}