如何使用JavaScript显示asp.net页的验证摘要

Question

I have one asp.net form.
In it i have many fields which are required.
I want to display validation summary of all fields at the end of the form.
I have already checked for valid values of input controls.
Now i only want is Summary.

Here is my code for valid data input

<script language="javascript" type="text/javascript">
        function userCheck(uName) {
            var uName = document.getElementById(uName);
            var letters = /^[A-Za-z0-9]+$/;
            if (uName.value.match(letters) && uName.value.length != 0) {
                uName.style.border = "2px solid #008A2E";
                return true;
            }
            else {
                uName.value = uName.value.replace(/[\W]/g, '');
                uName.style.border = "2px solid #ff0000";
                uName.focus();
                return false;
            }
        }
</script>

This is just one function for username check.
I have many more to deal with.
Is there any way to display summary from all fields at the last when submit button is pressed ?
below solution is not working.

 function ddlcheck(ddlclg) {
            var clg = document.getElementById(ddlclg.id);
            var clgname = document.getElementById('<%= LblCollegeName.ClientID %>');
            clgname.style.display = "block";
            clgname.innerHTML = "Selected College : " + clg.options[clg.selectedIndex].value;
            clg.style.border = "1px solid #008A2E";
            if (clg.options[clg.selectedIndex].value == "Select") {
                clgname.style.display = "none";
                clg.style.border = "1px solid #ff0000";
                validationhtml = validationhtml + "<b>*</b> College" + "</br>";
            }
        }

above code is for dropdownlist.

 function select() {
            var count = 0;
            var chkSelectAll = document.getElementById('<%= ChkSelectAll.ClientID %>');
            var chkList = document.getElementById('<%= chk.ClientID %>').getElementsByTagName("input");
            for (var i = 0; i < chkList.length; i++) {
                if (chkList[i].checked == true) {
                    count++;
                }
            }
            if (count == chkList.length)
                chkSelectAll.checked = true;
            else {
                chkSelectAll.checked = false;
            }
        }

above code is for selected check boxes.

Answer 1

create a div ( errorreport) at required location validation summary give it style as you needed

After that

<script language="javascript" type="text/javascript">
    var validationhtml="";
    function userCheck(uName) {
        var uName = document.getElementById(uName);
        var letters = /^[A-Za-z0-9]+$/;
        if (uName.value.match(letters) && uName.value.length != 0) {
            uName.style.border = "2px solid #008A2E";
            return true;
        } else {
            uName.value = uName.value.replace(/[\W]/g, '');
            uName.style.border = "2px solid #ff0000";
            uName.focus();
            validationhtml=validationhtml +"uname is not correct" ;
            return false;
        }
    }

    function validationsummary() {

        // if using jquery
        $(".errorreport").html(validationhtml); 

        //for javascript
        document.getelementbyid("errorreport").innerHTML = validationhtml; 

        if(validationhtml == "") {
            return true;
        } else {
            return false;
        }
    }
</script>

and call validationsummary() on submit button click