function urfOp(opf, opv) {
	self.location.href = '/search/'+opf+'?op='+opv;
}

function urfOt(opf, otv) {
	self.location.href = '/search/'+opf+'?ot='+otv;
}

function focusField(field, value) {
	if(field.value == value) {
		field.value = '';
	}
}

function blurField(field, value) {
	if(field.value == '') {
		field.value = value;
	}
}