<SCRIPT LANGUAGE="JavaScript">
<!--
function CheckNum(){
if (document.form1.mopian[0].checked && (document.form1.houdu.value=="" || document.form1.houdu.value==null))
{
alert("要求在文本框中的内容不为空");
}
if (!document.form1.mopian[0].checked)
{
document.form1.houdu.readonly=true;
}
}
//-->
</SCRIPT>
<input name="mopian" type="checkbox" id="mopian" value="磨片">
<input name="houdu" type="text" id="houdu" onKeyPress="javascript:CheckNum();" size="10" maxlength="15">
var text =document.getElementById("houdu");
text.readOnly = !obj.checked ? true : false;
<HEAD>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<input type="checkbox" name="mopian" onClick="abc()">
<input type="text" name="houdu">
<SCRIPT LANGUAGE="JavaScript">
<!--
function abc()
{
var obj = document.getElementById("mopian");
var text =document.getElementById("houdu");
text.readOnly = !obj.checked ? true : false;
}
//-->
</SCRIPT>
</BODY>
</HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<input type="checkbox" name="mopian" onClick="abc()">
<input type="text" name="houdu" onblur="ab()" readonly>
<SCRIPT LANGUAGE="JavaScript">
<!--
function abc()
{
var obj = document.getElementById("mopian");
var text =document.getElementById("houdu");
text.readOnly = !obj.checked ? true : false;
}
function ab()
{
obj = document.getElementById("mopian");
var text = document.getElementById("houdu");
if ((obj.checked)&&(text.value.length<1)){
alert("内容不能为空")
text.focus();
}
}
//-->
</SCRIPT>
</BODY>
</HTML>