js实现用鼠标直接动态改变各个项目的顺序的代码

2016-06-28 网页编程网 网页编程网

<html><head><title>排序</title><script>
var x=null;
var listObj=null;
//鼠标按下不放时的操作
function setTimeStart(type){
listObj=document.getElementById('forder');
//超过0.3秒启动连续的向上(下)的操作
if(type=="up"){
x=setTimeout(upListItem,300);
}else{
x=setTimeout(downListItem,300);
}
}
//将选中item向上
function upListItem(){
var selIndex=listObj.selectedIndex;
if(selIndex<0){
if(x!=null){clearTimeout(x);}
return;
}
if(selIndex==0){
if(x!=null){clearTimeout(x);}
return;
}
var selValue=listObj.options[selIndex].value;
var selText=listObj.options[selIndex].text;
listObj.options[selIndex].value=listObj.options[selIndex-1].value;
listObj.options[selIndex].text=listObj.options[selIndex-1].text;
listObj.options[selIndex-1].value=selValue;
listObj.options[selIndex-1].text=selText;
listObj.selectedIndex=selIndex-1;
if(selIndex+1>0){
x=setTimeout(upListItem,200)
}
}
//将选中item向下
function downListItem(){
var selIndex=listObj.selectedIndex;
if(selIndex<0){
if(x!=null){clearTimeout(x);}
return;
}
if(selIndex==listObj.options.length-1){
if(x!=null){clearTimeout(x);}
return;
}
var selValue=listObj.options[selIndex].value;
var selText=listObj.options[selIndex].text;
listObj.options[selIndex].value=listObj.options[selIndex+1].value;
listObj.options[selIndex].text=listObj.options[selIndex+1].text;
listObj.options[selIndex+1].value=selValue;
listObj.options[selIndex+1].text=selText;
listObj.selectedIndex=selIndex+1;
if(selIndex+1<listObj.options.length-1){
x=setTimeout(downListItem,200)
}
}
</script>
</head>
<body topMargin="20px" leftMargin="10px" rightMargin="0">
<TABLE id="Table1" height="100%" cellSpacing="0" cellPadding="0" width="100%" border="0">
<TR>
<TD vAlign="top">
<TABLE id="Table4" cellSpacing="0" cellPadding="0" width="100%" border="0">
<TR>
<TD><INPUT class="upBtn" type="button" value="向上↑" onmousedown="setTimeStart('up');" onmouseup="clearTimeout(x);"
onclick="listObj=document.getElementById('forder');upListItem();clearTimeout(x);" ID="Button1" NAME="Button1"> <INPUT style="WIDTH: 48px; HEIGHT: 22px" type="button" value="↓向下" class="downBtn" onmousedown="setTimeStart('down');"
onmouseup="clearTimeout(x);" onclick="listObj=document.getElementById('forder');downListItem();clearTimeout(x);" ID="Button2" NAME="Button2">
</TD>
</TR>
<TR>
<TD>
<SELECT id="forder" style="WIDTH: 304px; HEIGHT: 240px" size="15">
<OPTION value=1>1</OPTION>
<OPTION value=2>2</OPTION>
<OPTION value=3>3</OPTION>
<OPTION value=4>4</OPTION>
<OPTION value=5>5</OPTION>
<OPTION value=6>6</OPTION>
<OPTION value=7>7</OPTION>
<OPTION value=8>8</OPTION>
<OPTION value=9>9</OPTION>
</SELECT></TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>
</body></html>

阅读原文

阅读 4000

123 显示电脑版