function clickclear(thisfield, defaulttext) {
if (thisfield.value == defaulttext) {
thisfield.value = "";
}
}
function clickrecall(thisfield, defaulttext) {
if (thisfield.value == "") {
thisfield.value = defaulttext;
}
}

function reload_marca(form)
{
var val=form.marca.options[form.marca.options.selectedIndex].value;
var val2=""; 
var val3=form.precomin.options[form.precomin.options.selectedIndex].value;
var val4=form.precomax.options[form.precomax.options.selectedIndex].value;
var val5=form.anomin.options[form.anomin.options.selectedIndex].value;
var val6=form.anomax.options[form.anomax.options.selectedIndex].value;
var val7=form.kmsmin.options[form.kmsmin.options.selectedIndex].value;
var val8=form.kmsmax.options[form.kmsmax.options.selectedIndex].value;
var val9=form.combustivel.options[form.combustivel.options.selectedIndex].value;
var val10=form.categoria.options[form.categoria.options.selectedIndex].value;
var valor1=form.distrito.options[form.distrito.options.selectedIndex].value;
var valor2=form.concelho.options[form.concelho.options.selectedIndex].value;


self.location='index.php?marca=' + val + '&catid=' + val2 + '&precomin=' + val3 + '&precomax=' + val4 + '&anomin=' + val5 + '&anomax=' + val6 + '&kmsmin=' + val7 + '&kmsmax=' + val8 + '&combustivel=' + val9 + '&categoria=' + val10 + '&distrito=' + valor1 + '&concelho=' + valor2;
}

function reload(form)
{
var val=form.marca.options[form.marca.options.selectedIndex].value;
var val2=form.catid.options[form.catid.options.selectedIndex].value; 
var val3=form.precomin.options[form.precomin.options.selectedIndex].value;
var val4=form.precomax.options[form.precomax.options.selectedIndex].value;
var val5=form.anomin.options[form.anomin.options.selectedIndex].value;
var val6=form.anomax.options[form.anomax.options.selectedIndex].value;
var val7=form.kmsmin.options[form.kmsmin.options.selectedIndex].value;
var val8=form.kmsmax.options[form.kmsmax.options.selectedIndex].value;
var val9=form.combustivel.options[form.combustivel.options.selectedIndex].value;
var val10=form.categoria.options[form.categoria.options.selectedIndex].value;
var valor1=form.distrito.options[form.distrito.options.selectedIndex].value;
var valor2=form.concelho.options[form.concelho.options.selectedIndex].value;


self.location='index.php?marca=' + val + '&catid=' + val2 + '&precomin=' + val3 + '&precomax=' + val4 + '&anomin=' + val5 + '&anomax=' + val6 + '&kmsmin=' + val7 + '&kmsmax=' + val8 + '&combustivel=' + val9 + '&categoria=' + val10 + '&distrito=' + valor1 + '&concelho=' + valor2;
}

function reload_distrito(form)
{
var val=form.marca.options[form.marca.options.selectedIndex].value;
var val2=form.catid.options[form.catid.options.selectedIndex].value; 
var val3=form.precomin.options[form.precomin.options.selectedIndex].value;
var val4=form.precomax.options[form.precomax.options.selectedIndex].value;
var val5=form.anomin.options[form.anomin.options.selectedIndex].value;
var val6=form.anomax.options[form.anomax.options.selectedIndex].value;
var val7=form.kmsmin.options[form.kmsmin.options.selectedIndex].value;
var val8=form.kmsmax.options[form.kmsmax.options.selectedIndex].value;
var val9=form.combustivel.options[form.combustivel.options.selectedIndex].value;
var val10=form.categoria.options[form.categoria.options.selectedIndex].value;
var valor1=form.distrito.options[form.distrito.options.selectedIndex].value;
var valor2=0;


self.location='index.php?marca=' + val + '&catid=' + val2 + '&precomin=' + val3 + '&precomax=' + val4 + '&anomin=' + val5 + '&anomax=' + val6 + '&kmsmin=' + val7 + '&kmsmax=' + val8 + '&combustivel=' + val9 + '&categoria=' + val10 + '&distrito=' + valor1 + '&concelho=' + valor2;
}