window.onload = function(){
	preSearchVacs(); 
}

function preSearchVacs() {
var num = new Ajax.Updater ('numberres', '/welcome/presearchvacancies', {method:'post', postBody:'sector='+$F('sector')+'&region='+$F('region')+'&functioncat='+$F('functioncat')+'&educationlevel='+$F('educationlevel')+''});
	if(num < 1)
	{ 
		document.getElementById('searchmvb').disabled=true; 
	} else { 
		document.getElementById('searchmvb').disabled=false; 
	}
new Effect.Appear('numberres');	
}