function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}



function FieldClear(fieldname){
	var thisfield = fieldname;
	thisfield.value = "";
}





function hideAllLayers() {
        MM_showHideLayers('layercontact','','hide')
		
}


function showLayers() {
        MM_showHideLayers('layercontact','','show')
}


function hideLayers() {
        MM_showHideLayers('layercontact','','hide')
}