Sách mả nguồn Javascript/Hiển thị trình tìm kiếm

<script language="JavaScript">

function startSearch(){
searchString = document.searchForm.searchText.value; 
if(searchString != ""){
searchEngine = document.searchForm.whichEngine.selectedIndex + 1;
finalSearchString = "";

if(searchEngine == 1){
finalSearchString = "http://www.altavista.digital.com/cgi-bin/query?pg=q&what=web&fmt=.&q=" + searchString;
}
if(searchEngine == 2){
finalSearchString = "http://av.yahoo.com/bin/query?p=" + searchString + "&hc=0&hs=0";
}
if(searchEngine == 3){
finalSearchString = "http://www.excite.com/search.gw?trace=a&search=" + searchString;
}
if(searchEngine == 4){
finalSearchString = "http://www.hotbot.com/?SW=web&SM=MC&MT=" + searchString + "&DC=10&DE=2&RG=NA&_v=2&act.search.x=89&act.search.y=7";
}
if(searchEngine == 5){
finalSearchString = "http://www.infoseek.com/Titles?qt=" + searchString + "&col=WW&sv=IS&lk=noframes&nh=10";
}
if(searchEngine == 6){
finalSearchString = "http://www.lycos.com/cgi-bin/pursuit?adv=%26adv%3B&cat=lycos&matchmode=and&query=" + searchString + "&x=45&y=11";
}
if(searchEngine == 7){
finalSearchString = "http://netfind.aol.com/search.gw?search=" + searchString + "&c=web&lk=excite_netfind_us&src=1";
}

location.href = finalSearchString;
}
}


// -->
</script>

<basefont face="Verdana, Arial, sans-serif">

<form name="searchForm">

<table width=320 border cellpadding=3 cellspacing=2 bgcolor=444444>

<tr>
<td bgcolor=lightblue><font size=1 face="Verdana, Arial, sans-serif">Search for:<br>
<td bgcolor=lightblue><font size=1 face="Verdana, Arial, sans-serif">Search from:
<td bgcolor=lightblue>&nbsp;

<tr>
<td bgcolor=navajowhite><input style="background: dddddd" name="searchText" type="text">
<td bgcolor=navajowhite>
<select style="background: dddddd" name="whichEngine">
<option selected>Altavista
<option>Yahoo!
<option>Excite
<option>Hotbot
<option>Infoseek
<option>Lycos
<option>AOL Netfind
</select>
<td bgcolor=navajowhite><input type="button" value="Send" onClick="startSearch()">

</select>
</table>
</form>