如何从ajax传递两个值

Currently I'm pass one value from ajax to php using onlick event.this is my onclick

<a href="#" id="<?php echo $row['cat_id'];?>" onclick="showCat(this.id)" >click </a>

and this is my ajax code

function showCat(id) {
    //get the selected value

    //make the ajax call
    $.ajax({
        url: 'ajax_categ.php',
        type: 'GET',
        data: {option : id},
        success: function(data) {
           document.getElementById('meal').innerHTML =data;
        }
    });

}

what i want to do is,i want to pass another value from ajax code. this is i want to pass value

<input type="text" value="<?php echo $resname;?>" name="another"  />

You can get text box value using $("input[name='another']").val() and it can be passed to ajax call parameter which is mentioned in code.

function showCat(id) {
     var resname = $("input[name='another']").val();  //here you can getvalue of your textbox
    //make the ajax call
    $.ajax({
        url: 'ajax_categ.php',
        type: 'GET',
        data: {option : id, resname : resname},
        success: function(data) {
           document.getElementById('meal').innerHTML =data;
        }
    });

}

Edit your function so it accepts two parameters:

<a href="#" id="<?php echo $row['cat_id'];?>" onclick="showCat(this.id, '<?php echo $resname;?>')" >click </a>

function showCat(id, resname) {
    //get the selected value

    //make the ajax call
    $.ajax({
        url: 'ajax_categ.php',
        type: 'GET',
        data: {option : id, resname: resname},
        success: function(data) {
           document.getElementById('meal').innerHTML =data;
        }
    });

}

1. pass two argument in all_task()

onclick="all_task('<?=$all?>','<?=$project_id?>');"

2. then in Ajax file:

function all_task(val,project_id){

if(val!=''){

    $.ajax({
        type:"post",
        url:"ajax_alltask.php",
        data: '&all_val='+val+'&project_id='+project_id,
        dataType:"text",
        success:function(response){
            if(response!=''){
                $('.modal-body').html(response);
            }
        }
    });
 }
}