var provinceOp=null;
var cityOp=null;
var PROVNUM=9;

provinceOp = new Array(PROVNUM);
provinceOp[0]=new Option("È«²¿",0);

cityOp = new Array(PROVNUM);
cityOp[0] = new Array(1);
cityOp[0][0]=new Option("Please select",0);
cityOp[1] = new Array(7);
cityOp[1][0]=new Option("Digital PBX",1);
cityOp[1][1]=new Option("IP PBX",2);
cityOp[1][2]=new Option("Message system",3);
cityOp[1][3]=new Option("Call Center system",4);
cityOp[1][4]=new Option("Conference system",5);
cityOp[1][5]=new Option("Other",6); 
cityOp[1][6]=new Option("OTN",7); 
cityOp[2] = new Array(2);
cityOp[2][0]=new Option("Case for Enterprise Product",8);
cityOp[2][1]=new Option("Case for network Product",9);

function addCity(prov,city){

	var i = prov.selectedIndex;
         city.options.add(new Option("Please select",0));
        if (i==0){

}
else{

		for(j=0;j<cityOp[i].length;j++){

			city.options.add(new Option(cityOp[i][j].text, cityOp[i][j].value));
                      }
	}

}

function delCity(city){
	var len = city.length;
	for(i=0;i<len;i++){
		city.remove(0);
	}
}

function province_onchange(prov,city){


	delCity(city);
	addCity(prov,city);
}