Question

js实现下拉框和文本框间，下拉框有值，文本框没有值。下拉框没有值，文本框有值

Answer 1

<select id="xlk" onChange="ooo(this.options[this.selectedIndex])">
<option value="">请选择</option>
<option value="选择1">选择一1</option>

</select>
<input type="text" oninput="aaa(this.value)" value="xxoo" id="wbk">

<script>
var g=document.getElementById("wbk").value;

function aaa(vvv){
if(vvv!=""){
var h=document.getElementById("xlk");
g=vvv;
h.value="";
//h.options[h.selectedIndex].value="";
}
}
function ooo(rrr){

if(rrr.value==""){
document.getElementById("wbk").value=g;}else{document.getElementById("wbk").value="";}

}

</script>

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