function join { var elem1=document.getElementByName('a"); var elem2=document.getElementByName('b"); var elem3=document.getElementByName('p"); if( isObject(elem1) && isObject(elem2) && isObject(elem3)) { elem3.value=parseInt(elem1.value)+parseInt(elem2.value); } } 没测试。应该没错
{
var elem1=document.getElementByName('a");
var elem2=document.getElementByName('b");
var elem3=document.getElementByName('p");
if( isObject(elem1) && isObject(elem2) && isObject(elem3))
{
elem3.value=parseInt(elem1.value)+parseInt(elem2.value);
}
}
没测试。应该没错
document.all.p.value=eval(document.all.a.value + '+' + document.all.b.value)
</script><input type="text" name="a"><br>
<input type="text" name="b"><br>
<input type="text" name="p" readonly>不行,都试了,不行
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!--
function add()
{
document.all.p.value=eval(document.all.a.value)+eval(document.all.b.value);
}
//-->
</SCRIPT>
<BODY>
<input type="text" name="a" onblur="add()"><br>
<input type="text" name="b" onblur="add()"><br>
<input type="text" name="p" readonly>
</BODY>
</HTML>
<input type="text" name="b" value="0" onblur="javascript:p.value=parseFloat(a.value)+parseFloat(b.value)"><br/>
<input type="text" name="p" readonly>
今天太急,加班ing,明天给分