?? ch6_examp4.htm
字號:
<HTML>
<HEAD>
<SCRIPT LANGUAGE=JavaScript>
function butCheckForm_onclick()
{
var myForm = document.form1;
if (myForm.txtAge.value == "" || myForm.txtName.value == "")
{
alert("Please complete all the form");
if (myForm.txtName.value == "")
{
myForm.txtName.focus();
}
else
{
myForm.txtAge.focus();
}
}
else
{
alert("Thanks for completing the form " + myForm.txtName.value);
}
}
function txtAge_onblur()
{
var txtAge = document.form1.txtAge;
if (isNaN(txtAge.value) == true)
{
alert("Please enter a valid age");
txtAge.focus();
txtAge.select();
}
}
function txtName_onchange()
{
window.status = "Hi " + document.form1.txtName.value;
}
</SCRIPT>
</HEAD>
<BODY>
<FORM NAME=form1>
Please enter the following details:
<P>
Name:
<BR>
<INPUT TYPE="text" NAME=txtName onchange="txtName_onchange()">
<BR>
Age:
<BR>
<INPUT TYPE="text" NAME=txtAge onblur="txtAge_onblur()" SIZE=3 MAXLENGTH=3>
<BR>
<INPUT TYPE="button" VALUE="Check Details" NAME=butCheckForm
onclick="butCheckForm_onclick()">
</FORM>
</BODY>
</HTML>
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