btn-middle-border:#d5d5d5
btn-left-border:#acacae
input-border:#adadaf
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無标題文檔</title>
<script type="text/javascript" src="jquery-1.4.min.js"></script>
<script>
$(function(){
$("#dataValue").blur(function(){
var dataVal = $("#dataValue").val();
var ragNum = /^\d*$/;
var ragTest = ragNum.test(dataVal);
if(!ragTest){
$("#dataValue").val("");
}else if(dataVal > 500){
$("#dataValue").val("500");
}else if(dataVal < 1){
$("#dataValue").val("1");
}
})
$("#dataUp").click(function(){
var dataVal = $("#dataValue").val();
if(dataVal > 0 && dataVal < 500){
$("#dataValue").val(parseInt(dataVal) + 1);
}
})
$("#dataDown").click(function(){
var dataVal = $("#dataValue").val();
if(dataVal > 1){
$("#dataValue").val(parseInt(dataVal) - 1);
}
})
})
</script>
</head>
<body>
<input type="text" id="dataValue" />
<div id="dataUp">加加加</div>
<div id="dataDown">減減減</div>
</body>
</html>