<HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT ID=clientEventHandlersJS LANGUAGE=javascript>
<!--function button1_onclick() {
a=parseInt(text1.value);
alert(a);
b=hid.value;
if (a>b) alert("a>b");
else alert("a<b");
}//-->
</SCRIPT>
</HEAD>
<BODY><P><INPUT id=button1 type=button value=Button name=button1 LANGUAGE=javascript onclick="return button1_onclick()"><INPUT
id=text1 name=text1></P>
<input type=hidden id=hid value="2"></BODY>
</HTML>
<HEAD>
<TITLE></TITLE>
<SCRIPT ID=clientEventHandlersJS LANGUAGE=javascript>
<!--function button1_onclick() {
a=parseInt(text1.value);
alert(a);
b=hid.value;
if (a>b) alert("a>b");
else alert("a<b");
}//-->
</SCRIPT>
</HEAD>
<BODY><P><INPUT id=button1 type=button value=Button name=button1 LANGUAGE=javascript onclick="return button1_onclick()"><INPUT
id=text1 name=text1></P>
<input type=hidden id=hid value="2"></BODY>
</HTML>
你的a和b是字符串。
eval() 将字符串转化成数值
parseInt() 将字符串转化成整数
parseFloat() 将字符串转化成浮点数
escape() 将字符串转化成ASCII
unescape() 将ASCII转化成字符