日期:2014-05-17 浏览次数:20892 次
<Html> <Head> <SCRIPT LANGUAGE="JavaScript"> <!-- //定义 select 原值 var oldValue,oldText; //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 = 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==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 = sel.options[sel.selectedIndex].value; } //--> </SCRIPT> </Head> <Body> <!--调用--> <select style='width:130px;z-index:-1' name='tmpSel' onkeydown=catch_keydown(this) onkeypress=catch_press(this) onfocus=catch_focus(this)> <option value=''></option> <option value=''>A</option> <option value=''>B</option> <option value=''>C</option> </select> </Body> </Html>
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带有提示信息的
xieyj(原作)
<Html> <Head> <SCRIPT LANGUAGE="JavaScript"> <!-- //定义 select 原值 var oldValue,oldText; //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 = 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[sel.selectedIndex].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==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 = sel.options[sel.selectedIndex].value; } //select 选择框鼠标上移时提示选择的内容 function selMouseOver(obj){ with (document.all.div_hint){ innerText = obj.options[obj.selectedIndex].text; if (innerText.length > 0){ innerText = " " + innerText + " "; style.display = "block"; style.left = event.clientX + 16; style.top = event.clientY; } } } //select 选择框鼠标移开时消失 function selMouseOut(obj){ with (document.all.div_hint){ style.display = "none" } } //--> </SCRIPT> </Head> <Body> <!--调用--> <s