function ChangeBclass(pron,quset){
var Bclass=new Array();
var Bclassids=new Array();
Bclass.push('categories');
Bclassids.push('0');
Bclass.push('Supply');Bclassids.push('10');Bclass.push('Buy');Bclassids.push('11');document.getElementById("Bclass").length=Bclass.length;
for(var i=0;i<Bclass.length;i++){
  document.getElementById("Bclass").options[i].text=Bclass[i];
  document.getElementById("Bclass").options[i].value=Bclassids[i];
  if(Bclassids[i]==pron){
    document.getElementById("Bclass").options[i].selected=true;
  }

}
ChangeMclass(pron,quset);
}
function ChangeMclass(pron,quset){
var qu=new Array();
var quvalues = new Array();
qu=['the classes'];
quvalues=['0']
switch(pron){

case '10':qu.push('>50rmb');quvalues.push('62');qu.push('20-50rmb');quvalues.push('60');qu.push('10-20rmb');quvalues.push('59');qu.push('5-10rmb');quvalues.push('58');qu.push('2-5rmb');quvalues.push('57');qu.push('1-2rmb');quvalues.push('56');qu.push('<1rmb');quvalues.push('55');break;case '11':break;}
document.getElementById("Mclass").length=qu.length;
for(var i=0;i<qu.length;i++){
	document.getElementById("Mclass").options[i].text=qu[i];
	document.getElementById("Mclass").options[i].value=quvalues[i];
	if (quset!= ""&&quvalues[i]==quset) {
	document.getElementById("Mclass").options[i].selected=true;
	}
}
if(quset==""&&qu.length>1){
	document.getElementById("Mclass").options[1].selected=true;
	}
}