HTML / JavaScript代码将无法验证表单

Question

I am trying to validate the textboxes in a form but when the submit button is clicked and all boxes are empty all the code does is move on like it is all correctly filled out even when it isn't. This is the code I am using to validate the textboxes

function validateAndEmail(){        
    if(document.channelForm.chanName.value == “”) {
        alert(“Please provide your channel name.”);
        Return false;
    }
    else if(document.channelForm.chanURL.value == “”) {
        alert(“Please provide your channel URL.”);
        Return false;
    }
    else if(document.channelForm.famName.value == “”) {
        alert(“Please provide your Family name.”);
        Return false;
    }
    else if(document.channelForm.firName.value == “”) {
        alert(“Please provide your First name.”);
        Return false;
    }
    else if(document.channelForm.email.value == “”) {
        alert(“Please provide your valid Email.”);
        Return false;
    }
    else if(document.channelForm.address.value == “”) {
        alert(“Please provide your Address.”);
        Return false;
    }
    else {
        alert("Everything is ok. Dont panic!") 
        Return true;
    }   
}

I have tested this button using an alert that say "working" so it definitely is linked to the code but when i try to use an if statement even if the condition is met it will not run the statement. Any help you more experienced fellows can give me would be greatly appreciated.

Answer 1

1. Replace “” by ".
2. Replace Return by return without uppercase .
3. Change your text editor.

Valid function :

 function validateAndEmail() { var form = document.channelForm; console.log(form); if (form.chanName.value == "") { document.write("Please provide your channel name."); return false; } else if (form.chanURL.value == "") { document.write("Please provide your channel URL."); return false; } else if (form.famName.value == "") { document.write("Please provide your Family name."); return false; } else if (form.firName.value == "") { document.write("Please provide your First name."); return false; } else if (form.email.value == "") { document.write("Please provide your valid Email."); return false; } else if (form.address.value == "") { document.write("Please provide your Address."); return false; } else { document.write("Everything is ok. Dont panic!") return true; } } 

 <form name="channelForm" onsubmit="validateAndEmail()"> <input name="chanName"><br> <input name="chanURL"><br> <input name="famName"><br> <input name="firName"><br> <input name="email"><br> <input name="address"><br> <input type="submit" value="Ok" /> </form>