jquery - Dynamics Variable (variable++) in Append function DOM Javascript -


i have code

function add_fullboard_dalam_kota(){     var data='<?php echo $data; ?>';     var tambah=1;     var txt=1;     $("#fullboard_dalam_kota").append('<tr align="center" valign="middle"bgcolor="#e4e4e4">'       +'<td width="19%" ><input name="penyelenggara[]" type="text" id="'+tambah+'" onchange="showuser(this.value)"></td>'       +'<td width="19%" ><div id="'+txt+'"><b></b></div>'         +'</td>'       +'<td width="19%" ><input name="jumlah_peserta[]" type="text" id="jumlah_peserta[]"></td>'       +'<td width="19%" ><input name="jumlah_hari[]" type="text" id="jumlah_hari[]"></td>'       +'</tr>')     tambah=tambah+1;   txt=txt+1;    alert(tambah);

my question why value of "tambah" variable 2? , how make dynamically added 1 after 1 append() function called?

declare variable "tambah" outside of function.

//declare variable outside scope of fucn() var tambah=1;  function add_fullboard_dalam_kota(){     var data='<?php echo $data; ?>';     var txt=1;     $("#fullboard_dalam_kota").append('<tr align="center" valign="middle"bgcolor="#e4e4e4">'       +'<td width="19%" ><input name="penyelenggara[]" type="text" id="'+tambah+'" onchange="showuser(this.value)"></td>'       +'<td width="19%" ><div id="'+txt+'"><b></b></div>'         +'</td>'       +'<td width="19%" ><input name="jumlah_peserta[]" type="text" id="jumlah_peserta[]"></td>'       +'<td width="19%" ><input name="jumlah_hari[]" type="text" id="jumlah_hari[]"></td>'       +'</tr>')    tambah++;   txt++;   alert(tambah);  }

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