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我在JS中的数据验证代码中有一个非常棘手的错误，因为我需要做一个函数来检查页面中的所有HTML用户窗体，因为我必须以输入的数量要检查，如果第一个输入包含一个错误，但代码在第一个输入不包含错误时根本无法正常工作。我检查了循环，如果单独条件，我看不出错误，它会出现，我需要一个新鲜的眼光整个页面的代码是在这里：在JS中的数据验证代码中的棘手的错误
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
<style type="text/css">
#ballon{
border:solid 1px #c0c0c0;
background-color:yellow;
font-size:11px;
font-family:verdana;
padding:5px;
position:absolute;
z-index:2;
visibility:hidden;
}
</style>
<script language="javascript">
var bstatus="off";
var Errmsg="";
//1)function show error message ballon and used by checkall(x) function below
function Showmsg(error,Frm){
if(!document.getElementById("ballon")){//to check if the ballon div is created or not
var ballon=document.createElement("div")
ballon.id="ballon";
document.body.appendChild(ballon); }
else{
var ballon=document.getElementById("ballon");
}
if(bstatus=="on"){//to check if the ballon is visible or not
ballon.style.top=Frm.offsetTop +"px";
ballon.style.left=Frm.offsetLeft+ Frm.offsetWidth + 5 +"px";
ballon.innerHTML=error;
}else{
bstatus="on";
ballon.style.visibility="visible";
ballon.style.top=Frm.offsetTop +"px";
ballon.style.left=Frm.offsetLeft+ Frm.offsetWidth + 5 +"px"; ballon.innerHTML=error;
}
}//end of function
//2)hide the error message ballon and used by checkall() function below
function Hidemsg(){
bstatus="off"; Errmsg="";
var ballon=document.getElementById("ballon");
ballon.innerHTML="";
ballon.style.visibility="hidden";
}
function write(number){//to check where we are in the looping
var gad=document.getElementById("gad");
gad.innerHTML=gad.outerHTML+ number;
}
//3) check all function to review if values of the input forms
function checkall(x){
for(i=0;i<x;i++){//to loop on all input in form we need to check
var Formtype=" ";
var Myform=" ";
Myform=document.forms[0].elements[i];
Formtype=Myform.getAttribute("title");
switch(Formtype){
case "txt":
var value2check=/^[a-zA-Z]+$/;
var Errmode="Please enter text only"; break;
case "num":
var value2check=/^[0-9]+$/;
var Errmode="Please enter number only";break;
case "both":
var value2check=/^[0-9a-zA-Z]+$/;
var Errmode="No simples are allowed only alphanumerical values"; break;
case "email":
var value2check= /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
var Errmode="Please enter valid Email"; break;
case "domain":
var value2check= /((?:https?\:\/\/|www\.)(?:[-a-z0-9]+\.)*[-a-z0-9]+.*)/i;
var Errmode="Please enter valid URL"; break;
default:
var value2check="";
}//end of switch
if(Myform.value.length!=0 || Myform.value!=""){//to check if the form value is not null
if(Myform.value.match(value2check)){
Errmsg=""; Hidemsg();
write(Myform.name+" "+i+" "+bstatus+"<br>");//to test the where we are in the loop
}else{
Errmsg=Errmode; Showmsg(Errmsg,Myform); break;
} //end of inner If condition
}else{
Errmsg="Please fill in blank data";
Showmsg(Errmsg,Myform); break;
}//end of if statment
}//end of for loop
}//end of checkall function
</script>
</head>
<body>
<form action="" method="post">
Name of the New table:<input name="tblname" type="text" id="elem" placeholder="Enter tablename" title="txt"><br><br>
Number of columns: <input type="text" name="colnumb" placeholder="colnum" title="num" value="" size="3" maxlength="3" lenght="3"><br><br> Table Type: <select name="Tbltype"><option value="MyISAM"selected>MyISAM<option value="InnoDB">InnoDB<option value="CSV">CSV<option value="ARCHIVE">ARCHIVE</select><br><br>
<input type="button" name="next" value="Next >>" onclick="checkall(2)">
</form>
<div id="gad"></div>
</body>
</html>
将尝试在输入有效的txt第一个输入，它在表单中的其余输入上根本不起作用，而如果有非有效的数据，它将按计划运行 – Abogazala 2014-09-11 18:09:02