json< /title> <br><script type="text/javascript"> <br><!-- <BR>var list=[{"name":"China", <BR>"value":" 86", <BR>"province":[{"name":"Hubei", <BR>"value":"430000", <BR>"city":[{"name":"Wuhan","value ":"wh"}, <BR>{"name":"Huanggang","value":"hg"}, <BR>{"name":"Xiangyang","value":"xy"}]} , <BR>{"name":"Hebei", <BR>"value":"100000", <BR>"city":[{"name":"Handan","value":"hd"}, <BR>{"name":"Baoding","value":"bd"}, <BR>{"name":"Shijiazhuang","value":"sjz"}]}, <br><br> {"name":"Hunan", <BR>"value":"440000", <BR>"city":[{"name":"Changsha","value":"cs"}, <BR>{ "name":"Zhuzhou","value":"zz"}, <BR>{"name":"Hengyang","value":"hy"}]}]}, <BR>{"name": "United States", <BR>"value":"22", <BR>"province":[{"name":"Arkansas", <BR>"value":"990000", <BR>"city": [{"name":"New York","value":"ny"}, <BR>{"name":"Washington","value":"hsd"}, <BR>{"name":"Boston ","value":"bsd"}]}, <br><br>{"name":"Ahaha", <BR>"value":"980000", <BR>"city":[{" name":"AA","value":"ahd"}, <BR>{"name":"BB","value":"abd"}, <BR>{"name":"CC"," value":"asjz"}]}] <br><br>}]; <br><br>function init(){ <BR>var _country=document.getElementById("country"); <BR>for( var e in list){ <BR>var opt_1=new Option(list[e].name,list[e].value); <BR>_country.add(opt_1); <BR>} <BR>} <br><br><br><br>function toProvince(){ <BR>var _country=document.getElementById("country"); <BR>var _province=document.getElementById("province"); <BR>var _city =document.getElementById("city"); <BR>var v_country=_country.value; <br><br>_province.options.length=1; <BR>_city.options.length=1; <br><br>for(var e in list){ <BR>if(list[e].value==v_country){ <BR>for( var p in list[e].province){ <BR>var opt_2=new Option( list[e].province[p].name,list[e].province[p].value); <BR>_province.add(opt_2); <br><br>} <BR>break; <BR> } <BR>} <BR>} <br><br><BR>function toCity(){ <BR>var _country=document.getElementById("country"); <BR>var _province=document.getElementById("province "); <BR>var _city=document.getElementById("city"); <br><br>var v_country=_country.value; <BR>var v_province=_province.value; <br><br>//_province .options.length=1; <BR>_city.options.length=1; <br><br><BR>for(var e in list){ <BR>if(list[e].value==v_country) { <BR>for( var p in list[e].province){ <BR>//alert(list[e].province[p].value); <BR>if(list[e].province[p ].value==v_province){ <BR>// alert(list[e].province[p].value); <BR>for(var cc in list[e].province[p].city){ <BR>var opt_3=new Option(list[e].province[p].city[cc].name,list[e].province[p].city[cc].value); <BR>_city.add( opt_3); <BR>} <br><br>return; <BR>} <br><br><BR>} <BR>break; <BR>} <BR>} <BR>} <br><br>//--> <br></script> <br></head> <br><br><body onload="init();";> <br><select id="country" onchange="toProvince();"> <br><option value="-1">--Please select a country---</option> <br></select> <br><select id="province" onchange="toCity();"> <br><option value="-1">--Please select a province---</option> <br></select> <br><select id="city"> <br><option value="-1">--Please select the city---</option> <br> </select> <br><br></body> <br></html> <br>
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