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    <p>This is because you are doing two ajax calls and the second if statement is being hit before the value of a is changed. How the code will be read is:</p> <pre><code>var a = "1"; if ($("#maintable tbody tr").length&gt;0){ //some code here it goes through in order until: $.ajax({ //do this in the background, meanwhile keep executing the code on the page. }); } a is still 1 because results have not come back yet from previous ajax call. if(a =='1'){ $.ajax({ //now do this }); } </code></pre> <p>What you want to do is nest that second ajax call in the success of the first, e.g.:</p> <pre><code>$.ajax({ type: "POST", url: "../model/check_procurement_resold_with_invoice_number.php", data: { para : "upd", invno : invoice, product : prodid, date : vouchdt, quantity : quantity}, success: function(result){ if(result ==1){ a = "1"; $.ajax({ type: "POST", url: "../model/bulk_procurement_resold_at_lowprice.php", data: {action:'updatedb',ud:udata,ad:adata,dd:del_query,username:'&lt;?=$gotuser?&gt;'}, success: function(result){ results = JSON.parse(result); alert('Number of records Updated : '+results['utotal_s']+"\nNumber Of records Inserted : "+results['acnt']+"\nNumber of records Deleted : "+results['dcnt']); // window.location.href="bulk_procurement_resold_at_lowprice.php?vendorinfo="+vendorid+"&amp;dateinfo="+$("#dateinfo").val()+"&amp;catinfo="+$("#catinfo").val(); } }); } else { if(result == "") { alert(productname+" does not exist for invoice number "+invoice); a = "0"; return false } if(result == "2") { alert("Quantity "+ quantity +" for "+productname+" can't be greater than the quantity procured for invoice number "+invoice+" 1"); a = "0"; return false; } } } }); </code></pre> <p>And you'll need to move the <code>if (prodid != 'NA' &amp;&amp; muc != '' &amp;&amp; amt &gt; 0 &amp;&amp; rid != '')</code> function above the ajax call as well. </p>
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    1. POValidating dynamically added table row values from external php in ajax
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    1. COthanks alot but here there is another problem which i forgot to mention its the ajax is not taking the data in the table row order for eg : its takin 1st den 4th den 2nd and so on what could be the problem for that
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    2. COThat is because it is just an object the way you are sending it. If you want it to maintain it's order, it needs to be an array. More details and discussion here: http://stackoverflow.com/questions/7214293/is-the-order-of-elements-in-a-json-list-maintained
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