下来菜单根据数据库生成<select id="sl_1">....</select>
<select id="sl_2">....</select>
<select id="sl_3">....</select>
<select id="sl_4">....</select>如何用JS循环获取多个下来菜单所选的值?(不使用jquery,直接用JS的情况下)
<select id="sl_2">....</select>
<select id="sl_3">....</select>
<select id="sl_4">....</select>如何用JS循环获取多个下来菜单所选的值?(不使用jquery,直接用JS的情况下)
window.onload=function(){
var sels=document.getElementsByTagName('select');
var v='';
for(var i=0;i<sels.length;i++){
v+=sels[i].value;
}
alert(v);
}
for(var i = 1 ;i <= 4 ; i++){
var select =document.getElementById("sl_"+i);
var val = select.options[select.selectedIndex].value;
var text = select.options[select.selectedIndex].text;
}
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head><body>
<select><option value="1">1</option><option value="2">2</option></select>
<select><option value="1">1</option><option value="2">2</option></select>
<select><option value="1">1</option><option value="2">2</option></select>
<select><option value="1">1</option><option value="2">2</option></select>
<script>
var sels = document.getElementsByTagName('select');
for(var i = 0,s; s = sels[i++];){
~function(i){
sels[i-1].onchange = function(){
alert(this.options[this.selectedIndex].value)
};
}(i);
}
</script></body>
</html>