<form action= "" method= "post" name= "reply" onsubmit= "return check()" > |
</form> |
<script language= "javascript" > |
<!-- |
//javascript去空格函数 |
function LTrim(str){ //去掉字符串 的头空格 |
var i; |
for (i=0;i<str.length; i++) { |
if (str.charAt(i)!= " " ) break ; |
} |
str = str.substring(i,str.length); |
return str; |
} |
|
function RTrim(str){ |
var i; |
for (i=str.length-1;i>=0;i--){ |
if (str.charAt(i)!= " " &&str.charAt(i)!= " " ) break ; |
} |
str = str.substring(0,i+1); |
return str; |
} |
function Trim(str){ |
|
return LTrim(RTrim(str)); |
|
} |
|
function check() { |
if (Trim(document.reply.title.value) == "" ) { |
alert( "标题不能为空!" ); |
document.reply.title.focus(); |
return false ; |
} |
|
if (Trim(document.reply.cont.value) == "" ) { |
alert( "内容不能为空!" ); |
document.reply.cont.focus(); |
return false ; |
} |
|
return true ; |
|
} |
--> |
</script> |