it is possible to isset the text box value in jqery and how

<tr>
    <td><input type="text" size="15" name="lfname" id="lfname"  /></td>
    <td><input type="text" size="15" name="llname" id="llname"  /></td>
    <td><input type="text" size="15" name="lcom" id="lcom" /></td>
    <td><input type="text" size="15" name="lwophone" id="lwophone" /></td>
    <td><input type="text" size="15" name="lmob" id="lmob" /></td>
    <td><input type="text" size="15" name="lemail" id="lemail" /></td>
    <td><input type="button"  name="lsearch" id="lsearch" class="lsearch" value="search" /></td>
  </tr>

$(".lsearch").click(function(){
				/*************** lfname start *************/
				if($("#lfname").length)
				{
					var lfname=$("#lfname").val();
					var data="lfname="+lfname;
					//alert(data);
					$.ajax({
						type:"POST",
						url:"ajax/search.php",
						data:data,
						success:function(abc)
						{
							//alert(res);
							$res=abc.split("/");
							//alert($res);
							 if($res[0]==1)
				{
					window.location.href="showleads?forces="+$res[1];
					/*window.open('searchvendor?forces='+$res[1],'Vendor Search','width=800,height=500');*/
					
				}
				else
				   {
					   //alert("Please enter the First name");
				   }
						}
						   
						   });
				}
				/*************** lfname end *************/
				
				/*************** llname start *************/
				if($("#llname").length)
				{
					var llname=$("#llname").val();
					var data="llname="+llname;
					//alert(data);
					$.ajax({
						type:"POST",
						url:"ajax/search.php",
						data:data,
						success:function(abc)
						{
							//alert(res);
							$res=abc.split("/");
							//alert($res);
							 if($res[0]==1)
				{
					window.location.href="showleads?forces1="+$res[1];
					/*window.open('searchvendor?forces='+$res[1],'Vendor Search','width=800,height=500');*/
					
				}
				else
				   {
					   //alert("Please enter the last name");
				   }
						}
						   
						   });
				}
				/*************** llname end *************/
				if($("#lcom").length)
				{
					var lcom=$("#lcom").val();
					//alert(lcom);
				}
										 });

/*************** lname leads search page start *********/
if(isset($_REQUEST['lfname']))
{
$lfname=$_REQUEST['lfname'];
//echo $lfname;
$ans=$obj->select("le_fname,le_lname,le_comp,le_work_ph,le_mobile,le_email","leads","le_fname='$lfname'");


//print_r($ans);

if($ans=="0")
{
    echo 0;
}
else
{
    $searchcond2=$lfname;
      echo "1"."/".$searchcond2;
    //echo 1;
}
}
/*************** lname leads search page end *********/
/*************** llname leads search page start *********/
else if(isset($_REQUEST['llname']))
{
$llname=$_REQUEST['llname'];
//echo $lfname;
$ans=$obj->select("le_fname,le_lname,le_comp,le_work_ph,le_mobile,le_email","leads","le_lname='$llname'");


//print_r($ans);

if($ans=="0")
{
    echo 0;
}
else
{
    $searchcond3=$llname;
      echo "1"."/".$searchcond3;
    //echo 1;
}
}
/*************** lname leads search page end *********/

if(isset($_REQUEST['forces']))
                {
                    $name=$_REQUEST['forces'];
                //echo $name;
                $ans1=$obj->select("*","leads","le_fname='$name' ORDER BY le_id desc");
                ?>


                <?php
                foreach($ans1 as $val1)
                {?>
                    <tr align="center">
    <td><?php echo $val1[3] ?></td>
     <td><?php echo $val1[4]; ?></td>
    <td><?php echo $val1[2]; ?></td>
    <td><?php echo $val1[7]; ?></td>
    <td><?php echo $val1[8]; ?></td>
    <td><?php echo $val1[6]; ?></td>
    <td> <a href="#" class="table-icon assign" title="Assign" id="<?php echo $val1[0]; ?>"></a>
    <a href="editlead?id=<?php echo $val1[0]; ?>" class="table-icon edit" title="Edit"></a>
        <a href="#" class="table-icon delete" title="Delete" id="<?php echo $val1[0]; ?>"></a></td>

  </tr>
                <?php }
                }
                if(isset($_REQUEST['forces1']))
                {
                    $lname=$_REQUEST['forces1'];
                //echo $name;
                $ans1=$obj->select("*","leads","le_lname='$lname' ORDER BY le_id desc");
                ?>


                <?php
                foreach($ans1 as $val1)
                {?>
                    <tr align="center">
    <td><?php echo $val1[3] ?></td>
     <td><?php echo $val1[4]; ?></td>
    <td><?php echo $val1[2]; ?></td>
    <td><?php echo $val1[7]; ?></td>
    <td><?php echo $val1[8]; ?></td>
    <td><?php echo $val1[6]; ?></td>
    <td> <a href="#" class="table-icon assign" title="Assign" id="<?php echo $val1[0]; ?>"></a>
    <a href="editlead?id=<?php echo $val1[0]; ?>" class="table-icon edit" title="Edit"></a>
        <a href="#" class="table-icon delete" title="Delete" id="<?php echo $val1[0]; ?>"></a></td>

  </tr>
                <?php }
                }