PHP JavaScript form Validation

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PHP JavaScript form Validation
2 Answer(s) 2 years and 8 months ago
Posted in : PHP

Just looking for a general PHP JavaScript form Validation. How can I write external JavaScript Validation? Please suggest!

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October 6, 2010 at 11:53 AM

Hi Friend,

1) form

<html>
<script src="validateForm.js">
</script>
<form name="form" method="post" onsubmit="return validate();">
<table>
<tr><td>Enter Name</td><td><input type="text" name="name"></td></tr>
<tr><td>Enter Address</td><td><textarea rows="4" cols="8" name="address"></textarea></td></tr>
<tr><td>Gender</td><td><input type="radio" name="radio">M<input type="radio" name="radio">F</td></tr>
<tr><td>Qualification</td><td><select name="qua"><option value="BTech">BTech</option><option value="BTech">MBA</option><option value="BTech">MCA</option><option value="BTech">MTech</option></select></td></tr>
<tr><td>Specialization</td><td><select id="specialization" name="specialization" multiple="multiple" ><option value="Software">Software</option><option value="Hardware">Hardware</option><option value="Electrical">Electrical</option><option value="Mechanical">Mechanical</option><option value="Finance">Finance</option><option value="Finance">Marketing</option></select></td></tr>
<tr><td>Languages</td><td><input type="checkbox" name="lang1" value="Hindi">Hindi<input type="checkbox" name="lang2" value="English">English<input type="checkbox" name="lang3" value="French">French<input type="checkbox" name="lang4" value="German">German</td></tr>
<tr><td><input type="submit" value="Submit" ></td><td><input type="reset"></td></tr>
</table>
</form>
</html>

October 6, 2010 at 11:54 AM

continue..

2)validateForm.js:

function checkName(text) {
if(isNaN(text)){ return 1;}
else{alert("Please enter a valid name. The only charachters accepted are A - Z and a - z");return 0;}
}
function checkAddress(text) {
if(isNaN(text)){ return 1;}
else{alert("Please enter a valid address. The only charachters accepted are A - Z and a - z");return 0;}
}
function validate(){
if (document.form.name.value == ""){
alert ( "Please enter name." );
document.form.name.focus();
return false;
}
if (checkName(document.form.name.value)==false){
name.value=""
name.focus()
return false
}
if (document.form.address.value == ""){
alert ( "Please enter address." );
document.form.address.focus();
return false;
}
if (checkAddress(document.form.address.value)==false){
address.value=""
address.focus()
return false
}
if ( ( document.form.radio[0].checked == false ) && ( document.form.radio[1].checked == false ) ){
alert ( "Please choose Gender: M or F" );
document.form.radio[0].focus();
return false;
}
if ( document.form.qua.selectedIndex == 0 ){
alert ( "Please select Qualification." );
document.form.qua.focus();
return false;
}
if(!multiselect_validate(document.getElementById('specialization'))){
alert ( "Please select Specialization." );
return false;
}
if ((document.form.lang1.checked == false) &&(document.form.lang2.checked == false) &&(document.form.lang3.checked == false)&&(document.form.lang4.checked == false))
{
alert ('You didn\'t choose any of the checkboxes!');
return false;
}
var n=document.form.name.value;
var add=document.form.address.value;
document.writeln("Name= "+n);
document.writeln("");
document.writeln("Address= "+add);
var oRadio = document.forms[0].elements[radio].value;
document.write(oRadio);
return true;
}
function multiselect_validate(select) {
var valid = false;
for(var i = 0; i < select.length; i++) {
if(select.options[i].selected) {
valid = true;
break;
}
}
return valid;
}

Thanks

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