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<script type="text/javascript">
function checkamount(/*f*/){
var o=document.getElementsByName("abc");
/*var o=f.abc*/;
if(!o){alert('程序错误,无法验证!');return false}
for(var i=0;i<o.length;i++){
if(o[i].value==""){alert("内容"+(i+1)+"不能为空"); o[i].focus(); return false; }
}
}
</script>
<form id="thisform" name="thisform" method="post" action="" onsubmit='validchk(this)'>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="submit" name="button" id="button" value="提交" /></p>
</form>
<script>
function checkamount(f){
var o=f.abc;
if(!o){alert('程序错误,无法验证!');return false}
for(var i=0;i<o.length;i++){
if(o[i].value==""){alert("内容"+(i+1)+"不能为空"); o[i].focus(); return false; }
}
}
</script>
<form id="thisform" name="thisform" method="post" action="" onsubmit='checkamount(this)'>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="submit" name="button" id="button" value="提交" /></p>
</form>
<script>
function checkamount(f){
var o=f.abc, total=0;
if(!o){alert('程序错误,无法验证!');return false}
for(var i=0;i<o.length;i++){
if(o[i].value==""){total ++}
}
if(total==o.length){alert("内容不能为空"); return false; }
else {alert("提交成功!"); return true; }
}
</script>
<form id="thisform" name="thisform" method="post" action="" onsubmit='validchk(this)'>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="text" name="abc" id="abc" /></p>
<p><input type="submit" name="button" id="button" value="提交" /></p>
</form>
<script>
function checkamount(f){
var o=f.abc, total=0;
if(!o){alert('程序错误,无法验证!');return false}
for(var i=0;i<o.length;i++){
if(o[i].value==""){total ++}
}
if(total=o.length){alert("内容"+(i+1)+"不能为空"); o[i].focus(); return false; }
}
</script>