如何将多个select值连接起来添加到textarea
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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>
<script>
function arr(){
document.getElementById('a').value +=
document.getElementById('Query_field').value +=
document.getElementById('Operate').value +=
document.getElementById('requirement').value;
}
</script>
</head>
<body>
<select id="Query_field" name="Query_field">
<option value=""></option>
<option value="INVMB.MB001">品号</option>
<option>品名</option>
<option>规格</option>
<option>数量</option>
</select>
<select id="Operate" name="Operate">
<option value="" ></option>
<option value="=">等于</option>
<option>大于或等于</option>
<option>小于或等于</option>
<option>大于</option>
<option>小于</option>
<option>不等于</option>
<option>起始于</option>
<option>包含</option>
</select>
<input type="text" id="requirement" name="requirement" size="20" />
<input type="button" name="button" value="添加" onclick="arr()" /><br />
<textarea cols="50" rows="8" name="a" id="a"></textarea><br />
</body>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<script>
function arr(){
document.getElementById('a').value +=
document.getElementById('Query_field').value +=
document.getElementById('Operate').value +=
"'"+ document.getElementById('requirement').value+"'\n";
}
</script>
</head>
<body>
<select id="Query_field" name="Query_field">
<option value=""></option>
<option value="f1" >品号</option>
<option value="f2">品名</option>
<option value="f3">规格</option>
<option value="f4">数量</option>
</select>
<select id="Operate" name="Operate">
<option value="" ></option>
<option value="=" >等于</option>
<option value=">=">大于或等于</option>
<option value="<=">小于或等于</option>
<option value=">">大于</option>
<option value="<">小于</option>
<option value="!=">不等于</option>
<option value="link %">起始于</option>
<option value="link " >包含</option>
</select>
<input type="text" id="requirement" name="requirement" size="20" />
<input type="button" name="button" value="添加" onclick="arr()" /><br />
<textarea cols="50" rows="8" name="a" id="a"></textarea><br />
</body>
</html>
