<%
'dynamic_example.asp
%>
<HTML>
<HEAD>
<TITLE></TITLE>
</HEAD>
<BODY bgcolor="#eeeeee">
<form name="inputform" method="post" action="dynamic_example.asp" onSubmit="return checkForm()">
<TABLE BORDER=0 CELLPADDING=2 CELLSPACING=2 WIDTH=720>
<%
xmin=Request.Form("xmin")
xmax=Request.Form("xmax")
ymin=Request.Form("ymin")
ymax=Request.Form("ymax")
fx=Request.Form("fx")
if xmin<>"" and xmax<>"" and ymin<>"" and ymax<>"" and fx<>"" then
%>
<TR><TD width=40></TD>
<TD width=50 align=right>x-min:</TD>
<TD width=80 align=left><input name="xmin" value="<%=xmin%>" size=8></TD>
<TD width=50 align=right>x-max:</TD>
<TD width=80 align=left><input name="xmax" value="<%=xmax%>" size=8></TD>
<TD width=50 align=right>y-min:</TD>
<TD width=80 align=left><input name="ymin" value="<%=ymin%>" size=8></TD>
<TD width=50 align=right>y-max:</TD>
<TD width=80 align=left><input name="ymax" value="<%=ymax%>" size=8></TD>
<TD></TD>
</TR>
<TR><TD align=right>y=</TD>
<TD colspan=8 align=left><input name="fx" value="<%=fx%>" size=56></TD>
<TD><input type=submit value="Draw"></TD>
</TR>
<TR><TD colspan=10>
<IMG src="function.asp?xmin=<%=xmin%>&xmax=<%=xmax%>&ymin=<%=ymin%>&ymax=<%=ymax%>&fx=<%=Server.URLEncode(fx)%>">
</TD></TR>
<%
else
%>
<TR><TD width=40></TD>
<TD width=50 align=right>x-min:</TD>
<TD width=80 align=left><input name="xmin" value="-4" size=8></TD>
<TD width=50 align=right>x-max:</TD>
<TD width=80 align=left><input name="xmax" value="4" size=8></TD>
<TD width=50 align=right>y-min:</TD>
<TD width=80 align=left><input name="ymin" value="-2" size=8></TD>
<TD width=50 align=right>y-max:</TD>
<TD width=80 align=left><input name="ymax" value="5" size=8></TD>
<TD></TD>
</TR>
<TR><TD align=right>y=</TD>
<TD colspan=8 align=left><input name="fx" value="10/sqr(2*PI)*exp(-x*x/2)+sin(PI*x)" size=56></TD>
<TD><input type=submit value="Draw"></TD>
</TR>
<%
end if
%>
</TABLE>
</form>
<SCRIPT Language="JavaScript">
function checkForm()
{ var xmin=parseFloat(document.inputform.xmin.value);
var xmax=parseFloat(document.inputform.xmax.value);
var ymin=parseFloat(document.inputform.ymin.value);
var ymax=parseFloat(document.inputform.ymax.value);
if (isNaN(xmin)) { alert("x-min is not a number"); return(false); }
if (isNaN(xmax)) { alert("x-max is not a number"); return(false); }
if (isNaN(ymin)) { alert("y-min is not a number"); return(false); }
if (isNaN(ymax)) { alert("y-max is not a number"); return(false); }
return(true);
}
</SCRIPT>
</BODY>
</HTML> |