select支持手动输入 select支持手动输入

//select下拉框的onkeydown事件，修改下拉框的值 function catch_keydown(sel){ switch(event.keyCode) { case 13: //回车键 event.returnValue = https://www.it610.com/article/false; break; case 27: //Esc键 sel.options[sel.selectedIndex].text = oldText; sel.options[sel.selectedIndex].value = oldValue; event.returnValue = false; break; case 8://空格健 var s = sel.options[sel.selectedIndex].text; s = s.substr(0,s.length-1); if (sel.options[0].value==sel.options[sel.selectedIndex].text){ sel.options[sel.selectedIndex].value=s; sel.options[sel.selectedIndex].text=s; } event.returnValue = false; break; } if (!event.returnValue && sel.onchange) sel.onchange(sel) }

//select下拉框的onkeypress事件，修改下拉框的值 function catch_press(sel){ if(sel.selectedIndex>=0){ var s = sel.options[sel.selectedIndex].text + String.fromCharCode(event.keyCode); if (sel.options[sel.selectedIndex].value=https://www.it610.com/article/=sel.options[sel.selectedIndex].text){ sel.options[sel.selectedIndex].value=s; sel.options[sel.selectedIndex].text=s; } event.returnValue = false; if (!event.returnValue && sel.onchange) sel.onchange(sel) } }

//select下拉框的onfocus事件，保存下拉框原来的值 function catch_focus(sel) { oldText = sel.options[sel.selectedIndex].value; oldValue = https://www.it610.com/article/sel.options[sel.selectedIndex].value; }

【select支持手动输入】转载于:https://www.cnblogs.com/lcj0308/p/4773832.html