html,jsp的简单问题,100分在线求教,请达人帮忙!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
最后的分数了,在线等答复,立刻给分.
请问如何用html或jsp可以做到在点击列表框和按钮时,使列表框中选择的内容和按钮的名字出现在textarea中.(我感觉只能用JSP实现,不知道对不对)
html代码如下,请高手帮写几句代码.谢谢先
<html>
<head>
<title> aa </title>
</head>
<body>
<form action= "list.jsp " method= "POST "> Field
<br>
<select name= "field " multiple>
<option value= "hk "> Hong Kong </option>
<option value= "tw " > Taiwan </option>
<option value= "cn "> China </option>
<option value= "us "> United States </option>
<option value= "ca "> Canada </option>
</select>
<br>
<input type= "Button " value= "> ">
<input type= "Button " value= "< ">
<input type= "Button " value= "> = ">
<input type= "Button " value= "<= ">
<input type= "Button " value= "= ">
<input type= "Button " value= "_ " >
<br>
<input type= "Button " value= "and ">
<input type= "Button " value= "or ">
<input type= "Button " value= "not ">
<input type= "Button " value= "is ">
<input type= "Button " value= "% ">
<br> SQL
<textarea name= "comments " cols= "40 " rows= "4 ">
</textarea>
<br>
<input type= "Submit " value= "应用 ">
<input type= "Reset " value= "置空 ">
</form>
</body>
</html>
[解决办法]
<html>
<head>
<script language= "javascript ">
function getname(initValue){
var s= " ";
if(document.form1.comments.value != " "){
s = document.form1.comments.value;
}
s += initValue + " ";
document.form1.comments.value = s;
}
function clearvlue(){
document.form1.comments.value = " ";
}
</script>
<title> aa </title>
</head>
<body>
<form name= "form1 " action= "list.jsp " method= "POST "> Field
<br>
<select name= "field " multiple onchange= "getname(this.value); ">
<option value= "hk "> Hong Kong </option>
<option value= "tw " > Taiwan </option>
<option value= "cn "> China </option>
<option value= "us "> United States </option>
<option value= "ca "> Canada </option>
</select>
<br>
<input type= "Button " value= "> " onclick= "getname(this.value); ">
<input type= "Button " value= "< " onclick= "getname(this.value); ">
<input type= "Button " value= "> = " onclick= "getname(this.value); ">
<input type= "Button " value= "<= " onclick= "getname(this.value); ">
<input type= "Button " value= "= " onclick= "getname(this.value); ">
<input type= "Button " value= "_ " onclick= "getname(this.value); ">
<br>
<input type= "Button " value= "and " onclick= "getname(this.value); ">
<input type= "Button " value= "or " onclick= "getname(this.value); ">
<input type= "Button " value= "not " onclick= "getname(this.value); ">
<input type= "Button " value= "is " onclick= "getname(this.value); ">
<input type= "Button " value= "% " onclick= "getname(this.value); ">
<br> SQL
<textarea name= "comments " cols= "40 " rows= "4 ">
</textarea>
<br>
<input type= "Submit " value= "应用 ">
<input type= "button " value= "置空 " onclick= "clearvlue() ">
</form>
</body>
</html>
[解决办法]
<html>
<head>
<title> aa </title>
</head>
<body>
<form action= "list.jsp " method= "POST "> Field
<br>
<select name= "field " multiple onChange= "document.all.comments.innerHTML+=this.options[this.selectedIndex].innerHTML; ">
<option value= "hk "> Hong Kong </option>
<option value= "tw " > Taiwan </option>
<option value= "cn "> China </option>
<option value= "us "> United States </option>
<option value= "ca "> Canada </option>
</select>
<br>
<input type= "Button " value= "> " onClick= "document.all.comments.innerHTML+=this.value; ">
<input type= "Button " value= "< ">
<input type= "Button " value= "> = ">
<input type= "Button " value= "<= ">
<input type= "Button " value= "= ">
<input type= "Button " value= "_ " >
<br>
<input type= "Button " value= "and ">
<input type= "Button " value= "or ">
<input type= "Button " value= "not ">
<input type= "Button " value= "is ">
<input type= "Button " value= "% ">
<br> SQL
<textarea name= "comments " cols= "40 " rows= "4 ">
</textarea>
<br>
<input type= "Submit " value= "应用 ">
<input type= "Reset " value= "置空 ">
</form>
</body>
</html>
---------------------------------------------------
列表框 和 第一个 按钮帮你写好了
其他按钮 copy 第一个 就 ok了
[解决办法]
没事做帮你写了一个
<script language= "javascript ">
function add(){
var select = document.getElementById( "select ");
for(var i = 0; i < select.options.length; i++){
if (select.options[i].selected){
document.getElementById( "textarea ").value += select.options[i].text + "\r\n ";
}
}
}
</script>
<br>
<select name= "field " id= "select " multiple width=30%>
<option value= "hk "> Hong Kong </option>
<option value= "tw " > Taiwan </option>
<option value= "cn "> China </option>
<option value= "us "> United States </option>
<option value= "ca "> Canada </option>
</select>
<br>
<input type= "Button " value= "> " onclick= "add() ">
<input type= "Button " value= "< ">
<input type= "Button " value= "> = ">
<input type= "Button " value= "<= ">
<input type= "Button " value= "= ">
<input type= "Button " value= "_ " >
<br>
<input type= "Button " value= "and ">
<input type= "Button " value= "or ">
<input type= "Button " value= "not ">
<input type= "Button " value= "is ">
<input type= "Button " value= "% ">
<br> SQL
<textarea id= "textarea " name= "comments " cols= "40 " rows= "4 ">
</textarea>
<br>
<input type= "Submit " value= "应用 ">
<input type= "Reset " value= "置空 ">
