function check_form(){

if(document.getElementById('value_url').value){
document.getElementById('value_calc_button').disabled=true;
document.getElementById('value_calc_button').innerHTML="Calculating...";
document.location='/www.'+ encodeURIComponent(document.getElementById('value_url').value);

}
else
alert("Please enter a URL");

}

function update_form(url){

document.getElementById('value_update_button').disabled=true;
document.getElementById('value_update_button').innerHTML="Updating...";
document.location='/www.' + encodeURIComponent(url) + '?update=1';

}