您可以按以下方式修改代码，以使set_client_selfloop(1, ${i})中的i符合您的要求：
for (var i = 1; i <= 12; i++) {var start = (i - 1) * 4 + 1;var end = i * 4;title_val += `<tr><td class="qdd_value">${client_selfloop(i, start, end)}</td></tr>`;}function client_selfloop(i, start, end) {var optionsHTML = '';for (var j = start; j <= end; j++) {optionsHTML += `<option value=${j}>${j}</option>`;}return `LANE1: <select id='client_set_selfloop1${i}' style='width:115px'>${optionsHTML}</select><button onclick="set_client_selfloop(1, ${i})" style='margin-left:-3px;margin-top:3px;'>设置</button><br>LANE2: <select id='client_set_selfloop2${i}' style='width:115px'>${optionsHTML}</select><button onclick="set_client_selfloop(2, ${i})" style='margin-left:-3px;margin-top:3px;'>设置</button><br>LANE3: <select id='client_set_selfloop3${i}' style='width:115px'>${optionsHTML}</select><button onclick="set_client_selfloop(3, ${i})" style='margin-left:-3px;margin-top:3px;'>设置</button><br>LANE4: <select id='client_set_selfloop4${i}' style='width:115px'>${optionsHTML}</select><button onclick="set_client_selfloop(4, ${i})" style='margin-left:-3px;margin-top:3px;'>设置</button><br>`;}
这样修改后，当i为1时，LANE1-LANE4中的client_set_selfloop1${i}值将为1-4；当i为2时，值为5-8；当i为3时，值为9-12。以此类推。
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