Generating html tags dynamically

sachin lad · April 25th, 2005, 05:08 PM

I have following page which is generated using servlet..

<body>
<table>
<tr><td>Search
<form id="the form">
</td></tr>
<td><input type="text" name="searchValue1" value=""></input></td>
<td><select class = "FormField" name="searchElement1">
<option value="libId1"> Name1 </option>
<option value="libId2"> Name2 </option>
<option value="libId3"> Name3 </option>
<option value="libId4"> Name4 </option>
<option value="libId5"> Name5 </option></td>
</select>
<td><select class = "FormBool" name="boolElement1" >
<option value=" ">No Bool</option>
<option value="OR">OR</option>
<option value="AND">AND</option></td>
</select></form>
</td></tr>
</table>
</body>

Now what i want is that when the user chooses OR or NOT from the drop down box ..then the following code should be added to existing code..that is making number of elements on page double in number..
like..

<body>
<table>
<tr><td>Search
<form id="the form">
</td></tr>
<td><input type="text" name="searchValue1" value=""></input></td>
<td><select class = "FormField" name="searchElement1">
<option value="libId1"> Name1 </option>
<option value="libId2"> Name2 </option>
<option value="libId3"> Name3 </option>
<option value="libId4"> Name4 </option>
<option value="libId5"> Name5 </option></td>
</select>
<td><select class = "FormBool" name="boolElement1" >
<option value=" ">No Bool</option>
<option value="OR">OR</option>
<option value="AND">AND</option></td>
</select>

<td><input type="text" name="searchValue2" value=""></input></td>
<td><select class = "FormField" name="searchElement2">
<option value="libId1"> Name1 </option>
<option value="libId2"> Name2 </option>
<option value="libId3"> Name3 </option>
<option value="libId4"> Name4 </option>
<option value="libId5"> Name5 </option></td>
</select>
<td><select class = "FormBool" name="boolElement2" >
<option value=" ">No Bool</option>
<option value="OR">OR</option>
<option value="AND">AND</option></td>
</select>
</form>
</td></tr>
</table>
</body>

How can this be done..and i wuld be reading the contents of text boxes and drop down list later using servlet..

Any help in this regard would be greatly appreciated..

Thanking you in advance
Sachin

angrycat · April 26th, 2005, 05:35 PM

put your html in a string and use if statements,

String string1 = <first lot of text>
String string2 = <optional text 1>
String string3 = <optional text 2>

if (OrNot.equals(OR)) //assuming another string OrNot has the users response
{
string1 = string1 + string2
}
else
{
string1 = string 1 + string 3
}

Then write the string to the page

Alternatively you could create a loop to do something similar, this way you could create a variable number of fields.