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    <p>Something like this should work (untested, but shows you the idea):</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;script type="text/javascript"&gt; var zone1 = new Array("london", "manchester", "spain", "paris"); var zone2 = new Array("newyork", "toronto", "los angeles", "vancouver"); var zone3 = new Array("delhi", "seoul", "moscow", "dhaka"); var zones = {}; var zoneLabels = {}; zoneLabels.europe = "Europe"; zoneLabels.northamerica = "North America"; zoneLabels.asia = "Asia"; zones.europe = zone1; zones.northamerica = zone2; zones.asia = zone3; function validateForm(){ var x=document.forms["myForm"]["fname"].value; for (i in zones){ var zone = zones[i]; for(j in zone){ if( x == zone[j]){ alert("you are in " + zoneLabels[i]); return false; } } } alert("try again"); return false; } &lt;/script&gt; &lt;title&gt;test&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form name="myForm" action="" onsubmit="return validateForm()" method="post"&gt; Enter your City: &lt;input type="text" name="fname"&gt; &lt;input type="submit" value="Submit"&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>if you want to map the continent properties of the zones object to custom labels, you could define a second object (I edited the code above)</p> <p>UPDATE: </p> <p>If you want to add more zones, you should add a new zone array:</p> <pre><code>var zone4 = new Array("canberra","perth"); </code></pre> <p>Add this to the zones object:</p> <pre><code>zones.australia = zone4; </code></pre> <p>And add an entry to the zoneLabels object:</p> <pre><code>zoneLabels.australia = "Australia"; </code></pre>
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    1. POValidating textfield input from javascript array
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    1. COOK so, are you actually trying to compare two arrays like `(array1 == array2)` as in this line `if(if x == zone[j])`.
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      1. USVishal
    2. COx contains the value retrieved from the form textfield, not an array. And zone[j] contains an zone array element (city string). (the two if words should be only one of course, fixed)
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    3. COso you're comparing a single value to whole array? please see this question on [comparing arrays](http://stackoverflow.com/questions/27030/comparing-arrays-of-objects-in-javascript)
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