<html>
<head>
<script language="JavaScript" type="text/javascript">
function alert_showmsg(msgs)
{
var whole_msg="";
var first_elmnt=null;
for(var m=0;m < msgs.length;m++)
{
if(null == first_elmnt)
{
first_elmnt = msgs[m]["input_element"];
}
whole_msg += msgs[m]["msg"] + "\
";
}
alert(whole_msg);
if(null != first_elmnt)
{
sfm_set_focus(first_elmnt);
}
}
function sfm_validator_enable_focus(enable)
{
document.set_focus_onerror = enable;
}
function set_addnl_vfunction(functionname)
{
this.formobj.addnlvalidation = functionname;
}
function sfm_set_focus(objInput)
{
if(document.set_focus_onerror)
{
objInput.focus();
}
}
function sfm_enable_show_msgs_together()
{
this.show_errors_together=true;
this.formobj.show_errors_together=true;
}
function clear_all_validations()
{
for(var itr=0;itr < this.formobj.elements.length;itr++)
{
this.formobj.elements[itr].validationset = null;
}
}
function form_submit_handler()
{
var bRet = true;
document.error_disp_handler.clear_msgs();
for(var itr=0;itr < this.elements.length;itr++)
{
if(this.elements[itr].validationset &&
!this.elements[itr].validationset.validate())
{
bRet = false;
}
if(!bRet && !this.show_errors_together)
{
break;
}
}
if(this.addnlvalidation)
{
str =" var ret = "+this.addnlvalidation+"()";
eval(str);
if(!ret)
{
bRet=false;
}
}
if(!bRet)
{
document.error_disp_handler.FinalShowMsg();
return false;
}
return true;
}
function Validator(frmname)
{
this.formobj=document.forms[frmname];
if(this.formobj.onsubmit)
{
this.formobj.old_onsubmit = this.formobj.onsubmit;
this.formobj.onsubmit=null;
}
else
{
this.formobj.old_onsubmit = null;
}
this.formobj._sfm_form_name=frmname;
this.formobj.onsubmit=form_submit_handler;
this.ValAddition = add_validation;
this.setAddnlValidationFunction=set_addnl_vfunction;
this.clearAllValidations = clear_all_validations;
this.disable_validations = false;//new
document.error_disp_handler = new sfm_ErrorDisplayHandler();
this.EnableOnPageErrorDisplay=validator_enable_OPED;
this.EnableOnPageErrorDisplaySingleBox=validator_enable_OPED_SB;
this.show_errors_together=true;
this.EnableMsgsTogether=sfm_enable_show_msgs_together;
document.set_focus_onerror=true;
this.EnableFocusOnError=sfm_validator_enable_focus;
}
function add_validation(itemname,descriptor,errstr)
{
var condition = null;
if(arguments.length > 3)
{
condition = arguments[3];
}
if(!this.formobj)
{
alert("Error: The form object is not set properly");
return;
}//if
var itemobj = this.formobj[itemname];
if(itemobj.length && isNaN(itemobj.selectedIndex) )
//for radio button; don't do for 'select' item
{
itemobj = itemobj[0];
}
if(!itemobj)
{
alert("Error: Couldnot get the input object named: "+itemname);
return;
}
if(!itemobj.validationset)
{
itemobj.validationset = new ValidationSet(itemobj,this.show_errors_together);
}
itemobj.validationset.add(descriptor,errstr,condition);
itemobj.validatorobj=this;
}
function validator_enable_OPED()
{
document.error_disp_handler.EnableOnPageDisplay(false);
}
function validator_enable_OPED_SB()
{
document.error_disp_handler.EnableOnPageDisplay(true);
}
function edh_clear_msgs()
{
this.msgdisplay.clearmsg(this.all_msgs);
this.all_msgs = new Array();
}
function edh_FinalShowMsg()
{
this.msgdisplay.showmsg(this.all_msgs);
}
function edh_EnableOnPageDisplay(single_box)
{
if(true == single_box)
{
this.msgdisplay = new SingleBoxErrorDisplay();
}
else
{
this.msgdisplay = new DivMsgDisplayer();
}
}
function edh_ShowMsg(msg,input_element)
{
var objmsg = new Array();
objmsg["input_element"] = input_element;
objmsg["msg"] = msg;
this.all_msgs.push(objmsg);
}
function AlertMsgDisplayer()
{
this.showmsg = alert_showmsg;
this.clearmsg=alert_clearmsg;
}
function sfm_ErrorDisplayHandler()
{
this.msgdisplay = new AlertMsgDisplayer();
this.EnableOnPageDisplay= edh_EnableOnPageDisplay;
this.ShowMsg=edh_ShowMsg;
this.FinalShowMsg=edh_FinalShowMsg;
this.all_msgs=new Array();
this.clear_msgs=edh_clear_msgs;
}
function alert_clearmsg(msgs)
{
}
function sfm_show_error_msg(msg,input_elmt)
{
document.error_disp_handler.ShowMsg(msg,input_elmt);
}
function SingleBoxErrorDisplay()
{
this.showmsg=sb_div_showmsg;
this.clearmsg=sb_div_clearmsg;
}
function sb_div_clearmsg(msgs)
{
var divname = form_error_div_name(msgs);
show_div_msg(divname,"");
}
function ValidationDesc(inputitem,desc,error,condition)
{
this.desc=desc;
this.error=error;
this.itemobj = inputitem;
this.condition = condition;
this.validate=vdesc_validate;
}
function vdesc_validate()
{
if(this.condition != null )
{
if(!eval(this.condition))
{
return true;
}
}
if(!validateInput(this.desc,this.itemobj,this.error))
{
this.itemobj.validatorobj.disable_validations=true;
sfm_set_focus(this.itemobj);
return false;
}
return true;
}
function ValidationSet(inputitem,msgs_together)
{
this.vSet=new Array();
this.add= add_validationdesc;
this.validate= vset_validate;
this.itemobj = inputitem;
this.msgs_together = msgs_together;
}
function add_validationdesc(desc,error,condition)
{
this.vSet[this.vSet.length]=
new ValidationDesc(this.itemobj,desc,error,condition);
}
function vset_validate()
{
var bRet = true;
for(var itr=0;itr<this.vSet.length;itr++)
{
bRet = bRet && this.vSet[itr].validate();
if(!bRet && !this.msgs_together)
{
break;
}
}
return bRet;
}
function TestRequiredInput(objValue,strError)
{
var ret = true;
var val = objValue.value;
val = val.replace(/^\\s+|\\s+$/g,"");//trim
if(eval(val.length) == 0)
{
if(!strError || strError.length ==0)
{
strError = objValue.name + " : Required Field";
}//if
sfm_show_error_msg(strError,objValue);
ret=false;
}//if
return ret;
}
function TestMaxLen(objValue,strMaxLen,strError)
{
var ret = true;
if(eval(objValue.value.length) > eval(strMaxLen))
{
if(!strError || strError.length ==0)
{
strError = objValue.name + " : "+ strMaxLen +" characters maximum ";
}//if
sfm_show_error_msg(strError,objValue);
ret = false;
}//if
return ret;
}
function TestMinLen(objValue,strMinLen,strError)
{
var ret = true;
if(eval(objValue.value.length) < eval(strMinLen))
{
if(!strError || strError.length ==0)
{
strError = objValue.name + " : " + strMinLen + " characters minimum ";
}//if
sfm_show_error_msg(strError,objValue);
ret = false;
}//if
return ret;
}
function TestInputType(objValue,strRegExp,strError,strDefaultError)
{
var ret = true;
var charpos = objValue.value.search(strRegExp);
if(objValue.value.length > 0 && charpos >= 0)
{
objValue.style.background="red";
if(!strError || strError.length ==0)
{
strError = strDefaultError;
}//if
sfm_show_error_msg(strError,objValue);
ret = false;
}//if
return ret;
}
function TestLessThan(objValue,strLessThan,strError)
{
var ret = true;
if(isNaN(objValue.value))
{
sfm_show_error_msg(objValue.name +": Should be a number ",objValue);
ret = false;
}//if
else
if(eval(objValue.value) >= eval(strLessThan))
{
if(!strError || strError.length ==0)
{
strError = objValue.name + " : value should be less than "+ strLessThan;
}//if
objValue.style.background="lightblue";
sfm_show_error_msg(strError,objValue);
ret = false;
}//if
return ret;
}
function TestGreaterThan(objValue,strGreaterThan,strError)
{
var ret = true;
if(isNaN(objValue.value))
{
sfm_show_error_msg(objValue.name+": Should be a number ",objValue);
ret = false;
}//if
else
if(eval(objValue.value) <= eval(strGreaterThan))
{
if(!strError || strError.length ==0)
{
strError = objValue.name + " : value should be greater than "+ strGreaterThan;
}//if
objValue.style.background="lightblue";
sfm_show_error_msg(strError,objValue);
ret = false;
}//if
return ret;
}
function CheckBtwValues(objValue,strGrtVal,strError)
{
var ret = true;
if(isNaN(objValue.value))
{
sfm_show_error_msg(objValue.name+": should be numbers ",objValue);
ret = false;
}//if
else
if(objValue.value == '')
{
strError = "Please enter GPA ";
fldColor = "pink";
}//if
else
if(eval(objValue.value) >= 1 && eval(objValue.value) < 2)
{
alert("Fair::You Got D Grade");
document.cs101frm.submit();
fldColor = "lime";
}//if
else
if(eval(objValue.value) >= 2 && eval(objValue.value) < 3)
{
alert("Good::You Got C Grade");
document.cs101frm.submit();
fldColor = "lime";
}//if
else
if(eval(objValue.value) >= 3 && eval(objValue.value) < 4)
{
alert("Very Good::You Got B Grade");
document.cs101frm.submit();
fldColor = "lime";
}//if
if(eval(objValue.value) == 4)
{
alert("Excellent::You Got A Grade");
document.cs101frm.submit();
fldColor = "lime";
}//if
objValue.style.background=fldColor;
sfm_show_error_msg(strError,objValue);
ret = false;
return ret;
}
function validateInput(strValidateStr,objValue,strError)
{
var ret = true;
var epos = strValidateStr.search("=");
var command = "";
var cmdvalue = "";
if(epos >= 0)
{
command = strValidateStr.substring(0,epos);
cmdvalue = strValidateStr.substr(epos+1);
}
else
{
command = strValidateStr;
}
switch(command)
{
case "req":
case "required":
{
ret = TestRequiredInput(objValue,strError)
break;
}//case required
case "maxlength":
case "maxlen":
{
ret = TestMaxLen(objValue,cmdvalue,strError)
break;
}//case maxlen
case "minlength":
case "minlen":
{
ret = TestMinLen(objValue,cmdvalue,strError)
break;
}//case minlen
case "dec":
case "decimal":
{
ret = TestInputType(objValue,"[^0-9\\.]",strError,
"Please enter numeric value only ");
break;
}
case "lt":
case "lessthan":
{
ret = TestLessThan(objValue,cmdvalue,strError);
break;
}
case "gt":
case "greaterthan":
{
ret = TestGreaterThan(objValue,cmdvalue,strError);
break;
}//case greaterthan
case "CheckGPA":
{
ret = CheckBtwValues(objValue,strError);
break;
}
}//switch
return ret;
}
</script>
</head>
<body>
<h1 align="center">BC080400572 :: Enter Your GPA</h1>
<form action="http://www.vu.edu.pk" method="post" id="cs101frm">
<table width="640" border="2" bordercolor="#CCCCCC" align="center">
<tr>
<td width="640" height="80" align="center" bgcolor="#CCCCCC">GPA</td>
<td width="640" bgcolor="#CCCCCC"><input name="GPA" type="text" id="GPA" size="75" ></td>
</tr>
<tr>
<td height="80" bgcolor="#CCCCCC"> </td>
<td align="center" bgcolor="#CCCCCC"><input type="submit" name="button" id="button" value="Find Grade" ></td>
</tr>
</table>
</form>
<script language="javaScript" type="text/javascript">
var ValidFrm = new Validator("cs101frm");
ValidFrm.ValAddition("GPA","integer");
ValidFrm.ValAddition("GPA","maxlen=4","Maximum length is 4");
//ValidFrm.ValAddition("GPA","gt=0","Please enter a number which is greater than 0");
ValidFrm.ValAddition("GPA","gt=0","Numeric Value must be between 1 and 4");
ValidFrm.ValAddition("GPA","lt=5","Numeric Value must be between 1 and 4");
ValidFrm.ValAddition("GPA","CheckGPA");
</script>
</body>
</html>
You’ve got some logic errors in your code. Some basic debugging should find them for you.