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本文執行個體講述了JavaScript實現串聯功能表的方法。分享給大家供大家參考。具體實現方法如下：
<html><head> <title>test</title> <script type="text/javascript"> function f() { var sel=document.getElementById("country"); var sel2=document.getElementById("city"); var cnarr1=new Array("bj","sh") var cnarr2=new Array("beijing","shanghai") var usaarr1=new Array("dc","ny") var usaarr2=new Array("Washington","NewYork") for(var i=sel2.length;i>=0;i--){ sel2.removeChild(sel2.childNodes[i]); } var op=document.createElement("option"); op.value="please"; op.text="please"; sel2.appendChild(op); if(sel.value=='USA'){ for(i=0;i<2;i++){ op.value=usaarr1[i]; op.text=usaarr2[i]; sel2.appendChild(op); } } else if(sel.value=='CN'){ for(i=0;i<2;i++){ op.value=cnarr1[i]; op.text=cnarr2[i]; sel2.appendChild(op); } } } </script></head><body><select onchange="f()" id='country'> <option >please</option> <option value='USA'>America</option> <option value='CN'>China</option></select><select id='city'> <option >please</option></select></body></html>
希望本文所述對大家的javascript程式設計有所協助。
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